Clinical Guides
Chronic Pain
A clinically focused guide to assessing and managing chronic primary and secondary pain in Indian practice, with multimodal rehabilitation, opioid safeguards, referral thresholds and explicit evidence limits.
MedNext Academy | 14 min read
Chronic Pain
A clinically focused guide to assessing and managing chronic primary and secondary pain in Indian practice, with multimodal rehabilitation, opioid safeguards, referral thresholds and explicit evidence limits.
Summary
Chronic pain persists or recurs for longer than three months and is best understood as a clinical problem affecting function, sleep, mood, relationships and participation rather than as a pain-score abnormality alone. Chronic secondary pain is attributable to an underlying condition such as osteoarthritis, cancer, endometriosis or neuropathy. Chronic primary pain is a diagnosis in which no other condition adequately accounts for the pain or its impact. The two can coexist. This distinction guides reasoning, but neither label makes symptoms less real or predicts a uniform response to treatment.
Assessment must first identify time-critical disease, then establish a positive formulation that integrates pain mechanism, contributing conditions, medicine exposure, psychological health and the person's priorities. Nociceptive, neuropathic and nociplastic features may overlap. Repeated imaging without a new clinical question can amplify incidental findings, while prematurely attributing everything to sensitisation can miss new pathology. A stable diagnosis therefore requires proportionate investigation and deliberate reassessment when the pattern changes.
Management aims to improve meaningful activity, safety and self-efficacy. Education, collaboratively paced movement, condition-specific treatment, sleep and mental-health care, and multidisciplinary rehabilitation usually provide the foundation. Medicines are time-limited trials with explicit targets and stopping rules. Opioids are not routine treatment for chronic primary pain; when already used, benefit and harm require structured review, and abrupt or coercive tapering is unsafe. Indian prescribing must comply with current product information, the Drugs and Cosmetics framework, and applicable NDPS rules. international and CDC guidance are labelled international comparators, not Indian law. This quarantined draft has been reviewed by the MedNext Clinical Team and is not individual medical advice.
How Common Is It?
Chronic pain is common, but a single percentage is misleading. Surveys differ in whether they ask about any pain beyond three months, clinically significant pain, chronic primary pain, disability or a named condition. current guidelines public information cites roughly three to five people in ten in the populations it considered, but that figure is not an Indian prevalence estimate. Age distribution, occupation, sex, access to diagnosis, language and sampling method strongly influence results. India does not have one recent, nationally representative registry that consistently separates chronic primary from chronic secondary pain across states and care settings.
The clinical burden is broader than prevalence. Persistent pain can reduce mobility, employment, study, caregiving and sleep; it may coexist with depression, anxiety, substance use, frailty and social isolation. People in tertiary pain services represent a selected group with greater severity or treatment resistance, while community surveys include milder symptoms. Rural populations, informal workers and people who cannot afford repeated consultation may be underrepresented in facility data. Conversely, imaging-based clinic labels may count structural findings that are not the main driver of disability.
Service planning should therefore measure duration, pain-related interference, days of restricted activity, medicine exposure, return visits and access to rehabilitation, not merely the number of pain diagnoses. Clinicians should avoid telling a patient that their condition is rare or inevitable on the basis of an imported statistic. For an individual, prognosis depends more on mechanism, comorbidity, functional baseline, distress, sleep, occupational demands and continuity of care than on a headline prevalence. Research estimates should be quoted only with the population, definition and uncertainty attached.
Risk Factors
Risk is distributed across biological, psychological and social domains, and no risk factor proves that pain is exaggerated or self-inflicted. Chronic secondary pain may follow osteoarthritis, inflammatory disease, nerve injury, diabetes, surgery, cancer treatment, endometriosis, sickle cell disease or persistent headache. Repeated acute pain, poor initial recovery, sleep disturbance and severe functional limitation can increase the chance that pain persists. Older age increases exposure to degenerative and neuropathic conditions, although chronic primary pain also affects younger adults. Genetic susceptibility and altered nociceptive processing are plausible contributors but are not clinically diagnostic tests.
Depression, anxiety, trauma symptoms, fear of movement and catastrophising may increase disability and deserve compassionate treatment. They are modifiers and consequences as well as possible antecedents; using them to discredit symptoms is clinically wrong. Poverty, insecure work, heavy manual labour, caregiving, inadequate housing, limited rehabilitation and delayed access to diagnosis can sustain pain. Social withdrawal and compensation disputes may complicate recovery, but financial or legal context does not determine whether pain is genuine.
Iatrogenic risks require equal attention. Repeated low-value procedures, prolonged immobilisation, fragmented prescribing, escalating opioids, concurrent benzodiazepines, sedating gabapentinoids and duplicate over-the-counter products can worsen function or cause toxicity. Renal or hepatic impairment, sleep apnoea, older age, pregnancy, alcohol use and prior overdose alter medicine risk. A past pain diagnosis creates diagnostic overshadowing: new focal night pain, inflammatory signs or neurological change may be missed. Protective factors include a shared formulation, graded activity, reliable follow-up, supportive relationships and one coordinated medicine plan. Risk assessment should guide modifiable targets without promising that controlling every factor will eliminate pain.
Diagnosis
History
Establish onset, duration, distribution, quality, fluctuation and precipitating events. Ask what the pain prevents, not only how severe it feels: walking, sleep, self-care, work, study, intimacy and valued roles are useful anchors. Elicit burning, electric shocks, allodynia or numbness for neuropathic mechanisms; stiffness, swelling or systemic symptoms for inflammatory disease; and widespread pain with fatigue or sensory amplification for nociplastic features. Record prior diagnoses, operations, imaging, treatments, actual medicine use, benefit, sedation, withdrawal, non-prescribed products and substance use. Screen sensitively for mood symptoms, suicide risk, trauma, sleep apnoea and the person's explanation and goals.
Examination
Observe appearance, vital signs when indicated, gait, transfers and functional movement. Examine the painful region and relevant joints, spine, skin, vascular system and nervous system, seeking objective inflammation, deformity, focal weakness, sensory level, reflex change, vascular compromise or a mass. Look beyond the reported site when referred pain is possible. Reproducible tenderness supports localisation but is not a test of character. Compare findings with the history and avoid painful manoeuvres that do not answer a clinical question.
Investigations
There is no universal chronic-pain panel. Use targeted blood tests, imaging, electrodiagnosis or specialist testing only when a specific differential, red flag or treatment decision justifies it. Review previous images and reports before repeating them, and explain incidental age-related findings. Chronic primary pain is a positive clinical diagnosis after proportionate assessment, not a declaration that nothing is wrong. Reassess when symptoms change, function declines unexpectedly or new objective signs emerge. Document mechanism, contributing diagnoses, functional effect, safety issues and an agreed review plan.
Differential Diagnosis
The differential begins with the pain distribution and mechanism. Local nociceptive causes include osteoarthritis, tendinopathy, mechanical spinal pain, fracture, inflammatory arthritis and visceral disease. Neuropathic causes include diabetic neuropathy, post-herpetic neuralgia, radiculopathy, nerve entrapment, spinal cord disease and treatment-related nerve injury. Chronic primary pain syndromes include fibromyalgia, chronic primary musculoskeletal pain, chronic primary headache or orofacial pain, chronic primary visceral pain and complex regional pain syndrome under contemporary classifications. More than one mechanism may be present, and a structural lesion can coexist with disproportionate pain-related disability.
Serious alternatives must be selected clinically rather than listed ritualistically. Malignancy is considered with progressive focal pain, weight loss, previous cancer or destructive imaging. Infection is considered with fever, immune compromise, recent procedure, injection drug use or focal inflammatory signs. Inflammatory disease is suggested by synovitis, prolonged inflammatory stiffness, uveitis, psoriasis or systemic features. Vascular ischaemia, acute compartment pathology and referred cardiac or abdominal pain require urgent pathways. Progressive weakness, sphincter disturbance or a sensory level raises cord or cauda equina disease.
Medicine toxicity, opioid-induced hyperalgesia, withdrawal, alcohol-related neuropathy and sedative dependence can complicate the picture. Depression and anxiety can intensify suffering and impairment but should not be used as exclusion diagnoses. Somatic symptom disorder requires positive psychiatric criteria and disproportionate health-related thoughts or behaviours; persistent pain alone is insufficient. Sleep apnoea, hypothyroidism, anaemia and metabolic disease may amplify symptoms. A useful differential ends with a ranked plan: what must be excluded now, what can be tested selectively, what can be treated concurrently and which changes should trigger re-evaluation.
Management
Begin with a shared formulation and goals that matter to the person, such as reliable school attendance, cooking a meal, walking to a shop or sleeping at consistent times. Explain that improvement may occur through better function and fewer flares even if pain does not disappear. Validate the experience without promising a single anatomical fix. Provide a written plan covering activity, flare response, medicines, review timing and specific warning symptoms. Treat a remediable secondary cause, but avoid waiting for perfect pain relief before rehabilitation begins.
Collaboratively paced exercise is adapted to baseline capacity and condition: walking, strengthening, mobility, aquatic activity or physiotherapist-guided work may all be appropriate. Progress should be planned rather than driven by a good-day/bad-day cycle. Current guidelines recommends supervised group exercise for chronic primary pain and allows acceptance and commitment therapy or cognitive behavioural therapy for pain. These are UK recommendations and access varies in India; the transferable principle is active, skills-based, non-stigmatising care. Sleep disorders, depression, anxiety, obesity-related mechanical load and occupational barriers are addressed without presenting them as moral failings.
Multidisciplinary pain rehabilitation integrates medicine, physiotherapy, psychology, occupational therapy and social or vocational planning for complex disability. Interventions or surgery require a diagnosis-specific indication, plausible target, evidence discussion and exit plan; repeated procedures should not substitute for review. Use medicines as monitored trials with baseline function and a stopping rule. Review opioid therapy separately, checking indication, current dose, benefit, adverse effects, dependence, unsafe combinations and overdose risk. If risks exceed benefits, agree a patient-centred gradual change with support. Abrupt discontinuation, punitive urine testing and abandonment can cause harm.
Prescribing Information
For chronic primary pain, current guidelines advises against initiating opioids, gabapentinoids, antipsychotics, benzodiazepines, local anaesthetics, ketamine, corticosteroid injections, NSAIDs or paracetamol specifically to manage that diagnosis, and permits consideration of selected antidepressants after benefits and harms are discussed. These recommendations do not prohibit diagnosis-specific pharmacotherapy for chronic secondary pain. Neuropathic pain, inflammatory arthritis, migraine and cancer pain each have separate evidence pathways. Imported lists must not be converted into an Indian prescription without checking indication, marketing authorisation, comorbidity, interactions and current local guidance.
Before any trial, document the target domain, baseline function, expected review date and criteria for continuation. Check age, pregnancy or lactation, renal and hepatic function, gastrointestinal and cardiovascular risk, falls, sleep-disordered breathing, mood, overdose history and all sedating or serotonergic medicines. Start cautiously when appropriate, avoid duplicate brands and provide taper advice for drugs associated with withdrawal. Monitor benefit in daily activity and sleep as well as pain score. Lack of meaningful benefit after an adequate, tolerated trial supports deprescribing rather than automatic dose escalation.
Opioids require heightened safeguards. CDC 2022 is United States guidance, not Indian law, but supports maximising non-opioid care, discussing realistic benefits and risks, timely reassessment, caution with benzodiazepines, overdose-risk mitigation and treatment for opioid use disorder. Never abruptly stop long-term opioids unless a life-threatening emergency requires immediate action. In India, morphine, fentanyl, methadone, oxycodone, codeine and hydrocodone are listed as essential narcotic drugs under the cited notification, with possession, prescribing, dispensing and institutional requirements governed by the NDPS framework. Verify the current consolidated rules, state implementation, professional authority and record requirements before prescribing. This guide intentionally gives no dose or conversion ratio.
When to Refer
Refer urgently when red flags suggest cancer, infection, fracture, inflammatory emergency, vascular compromise, cord compression, cauda equina syndrome or serious medicine toxicity. A referral request should state the clinical question, pattern of change, relevant examination, prior tests, current medicines and immediate safety plan. Do not delay emergency imaging or stabilisation while waiting for a routine pain appointment. People with suicidal intent, severe self-neglect, psychosis or dangerous substance use need an urgent mental-health pathway alongside pain care.
Routine specialist referral is appropriate when diagnostic uncertainty remains after proportionate assessment, function deteriorates despite coordinated primary care, a specific intervention is being considered, or polypharmacy and dependence exceed local expertise. Choose the service to match the question: rheumatology for objective inflammatory features, neurology for focal or progressive neurological findings, orthopaedics or neurosurgery for a concordant surgical lesion, oncology or palliative care for cancer-related needs, and rehabilitation or multidisciplinary pain medicine for complex disability. Psychology or psychiatry supports comorbid illness and pain coping without implying that symptoms are imaginary.
Seek specialist pain or addiction input before complex opioid rotation, suspected opioid use disorder, high-risk controlled-drug combinations, major dose reduction after prolonged exposure or disagreement that threatens continuity. Pregnancy, severe renal or hepatic disease, recurrent overdose and sleep-disordered breathing may require additional expertise. Referral is not abandonment: the originating clinician should continue safety-netting, medicine reconciliation and follow-up. Where specialists are inaccessible, teleconsultation, a documented shared-care plan and staged local rehabilitation may reduce harm, but unavailable resources do not justify unsafe escalation or indefinite prescribing.
Red Flags
New urinary retention, saddle sensory loss, faecal incontinence, bilateral sciatica or rapidly progressive weakness can indicate cauda equina or cord compression and requires emergency assessment. Sudden cold painful limb, absent pulses or severe pain with vascular features suggests acute ischaemia. Fever with focal spinal or joint pain, immune compromise or recent invasive procedure raises infection. A hot swollen joint, rapidly spreading skin change, severe pain out of proportion or systemic instability must not be placed on a routine chronic-pain pathway.
Unexplained weight loss, persistent night sweats, progressive focal night pain, a new mass, pathological fracture or previous cancer warrants expedited investigation. New temporal headache with visual symptoms, jaw claudication or inflammatory features needs an urgent age-appropriate pathway. Chest pain, dyspnoea, acute abdominal signs, syncope, stroke symptoms and thunderclap headache are assessed as acute syndromes even in a person with longstanding pain. Earlier reassuring imaging does not neutralise a new objective change.
Medicine red flags include slow or shallow breathing, cyanosis, marked sedation, confusion, repeated falls or inability to awaken in someone taking opioids or other central nervous system depressants. Suspected overdose is an emergency. Agitation, sweating, clonus and hyperreflexia may indicate serotonin toxicity. Severe withdrawal can follow abrupt cessation of some medicines. Ask directly about suicidal thoughts, intent, access to medicines and overdose plans; chronic pain increases vulnerability, and dismissed distress can be fatal. Concerning domestic violence, coercive control or diversion also requires a safety response. The practical rule is simple: a familiar pain label never explains a new threat until that threat has been assessed.
Indian Clinical Context
Indian pain care spans primary clinics, district hospitals, tertiary centres, palliative services and a large private sector with uneven access to physiotherapy, psychology and trained pain specialists. Travel cost, wage loss, language, family roles and out-of-pocket spending often shape adherence more than a theoretically ideal programme. A safe plan should offer feasible home-based movement, clear written or pictorial instructions, scheduled review and low-cost treatment of demonstrable comorbidity. Yoga may be a preferred form of adapted activity for some patients, but it is neither compulsory nor a universal cure.
Avoid commercially promoted stem-cell procedures, proprietary injections, repeated vitamin infusions, unvalidated scans or blanket supplement panels when no diagnosis-specific evidence supports them. Explain uncertainty and distinguish a therapeutic trial from proven disease modification. Traditional or non-prescription products should be elicited respectfully because of duplication, contamination and interaction risk. Rehabilitation should accommodate manual work and caregiving instead of assuming that rest or formal gym access is possible. Disability documentation should describe observed and reported function rather than using a pain score alone.
Controlled-drug practice is a legal as well as clinical responsibility. The Department of Revenue and Central Bureau of Narcotics publish the current NDPS Act, Rules and essential narcotic drug notifications. Requirements differ by drug, quantity, practitioner role and whether an institution is recognised; clinicians and organisations must consult the current consolidated text and competent authority rather than rely on a summary. The cited CDC opioid guideline and international guidelines chronic-pain guideline are international evidence comparators and do not override Indian law, CDSCO-approved information, state rules or institutional policy. Access to legitimate cancer and palliative analgesia must not be obstructed by applying chronic non-cancer recommendations outside scope.
NMC Competency Mapping
Chronic pain integrates competencies from General Medicine, Orthopaedics, Pharmacology, Psychiatry, Anaesthesiology, Physical Medicine and Rehabilitation, Community Medicine and communication skills in the NMC CBME Curriculum 2024. Learners should take a biopsychosocial pain history, assess functional interference, recognise nociceptive and neuropathic features, perform a focused musculoskeletal and neurological examination, and choose investigations from a ranked differential. They should identify red flags, medicine toxicity, depression, suicide risk and substance-use disorder without stigmatising the patient.
At the knowledge and know-how levels, students should distinguish acute, subacute and chronic pain; primary and secondary pain; tolerance, physical dependence, withdrawal and opioid use disorder. They should explain why imaging abnormalities may not correlate with symptoms and why normal tests do not invalidate pain. Applied pharmacology includes NSAID, antidepressant, gabapentinoid, opioid and sedative harms, renal or hepatic considerations, interactions and principles of gradual deprescribing. Legal learning includes recognising that controlled-drug prescribing requires current Indian regulatory knowledge and supervised practice.
At show-how level, a learner can present a structured formulation, agree a functional goal, write a monitoring and safety-net plan, reconcile medicines and communicate uncertainty. Independent controlled-drug initiation, opioid rotation, interventional procedures and management of dependence exceed an undergraduate unsupervised role. This is an educational mapping across curriculum domains, not a claim that the NMC assigns one dedicated chronic-pain competency code. Assessment should reward recognition of serious pathology and compassionate longitudinal management, not reflex imaging, a fixed analgesic ladder or dismissal of psychological and social contributors.
Key Exam Pearls for NEET PG
Pain lasting or recurring for more than three months is chronic. Chronic primary pain is not merely pain of unknown cause; the pain or its impact is not adequately accounted for by another condition after appropriate assessment. Chronic secondary pain has an underlying cause, and both may coexist. Nociceptive pain arises from actual or threatened non-neural tissue injury, neuropathic pain from a lesion or disease of the somatosensory system, and nociplastic pain from altered nociception without clear evidence fully explaining it. These mechanisms can overlap and should not be treated as mutually exclusive answer choices when the vignette supports more than one.
Diagnosis is clinical and proportionate. Red flags determine urgent investigation; routine repeat imaging is not a treatment. Functional interference, sleep, mood, medicine exposure and goals belong in every chronic-pain history. Psychological treatment can be an evidence-based pain intervention and does not mean the pain is fabricated. Graded activity differs from advice to exercise through every flare, and pacing differs from indefinite rest. Multidisciplinary rehabilitation targets participation and self-management rather than a pain score alone.
For chronic primary pain, do not assume that common analgesics or opioids are automatically indicated; current guidelines specifically discourages initiating several drug classes for that diagnosis. Condition-specific secondary pain follows its own guideline. Opioid tolerance is reduced effect with repeated exposure, physical dependence produces withdrawal on cessation, and opioid use disorder is a behavioural clinical syndrome; the terms are not interchangeable. Avoid abrupt long-term opioid cessation. In India, essential narcotic drugs remain subject to NDPS rules. Exam questions may test principles, but real prescribing requires current regulation, product information and supervision.
Frequently Asked Questions
Does a normal scan mean that chronic pain is psychological or not real?
No. Imaging answers selected structural questions and often cannot measure nociceptive amplification, neuropathic symptoms or functional impact. Normal or non-concordant imaging should prompt a positive clinical formulation, not dismissal. Psychological and sleep factors may modify any pain condition and can be treated without implying fabrication. New objective changes still require reassessment.
Should a person taking long-term opioids for chronic pain stop them immediately?
Usually not. Abrupt or rapid non-consensual reduction can cause withdrawal, destabilisation, illicit sourcing and loss of care. First assess benefit, harm, dose, combinations, overdose risk and possible opioid use disorder. When change is indicated, agree an individual gradual plan with monitoring and support, except where an immediate life-threatening toxicity requires emergency action.
When is referral to a multidisciplinary pain service useful?
Referral is useful for severe functional restriction, complex or mixed mechanisms, repeated unsuccessful interventions, high-risk polypharmacy, dependence, diagnostic uncertainty or need for coordinated rehabilitation. The service should complement, not replace, local continuity. Emergency red flags follow an acute pathway rather than waiting for a routine pain appointment.
Are international and CDC chronic-pain recommendations directly binding in India?
No. They are transparent international evidence comparators with different jurisdictions and scopes. Indian clinicians must use current Indian product information, professional standards, NDPS and other applicable law, state requirements and institutional policy. Their transferable principles include person-centred assessment, non-pharmacological care, monitored medicine trials, opioid risk reduction and avoidance of abrupt discontinuation.
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