Educational draft · awaiting clinical reviewThe full textbook explains uncertainty but does not replace live national or local guidance, specialist advice, or current prescribing information.
Hypermobility and growing pains
Paediatrics and child health · UK scope · Sources checked 27 Aug 2026 · Clinical review pending
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Pain with systemic or neurological red flags
A child described as having growing pains or hypermobility now has fever, focal persistent bone pain, pallor, bruising, weakness, regression or inability to bear weight.
Action: Withdraw the benign label, assess ABCDE and function, examine joints, bones, neurology, abdomen and lymph nodes, and arrange same-day paediatric evaluation. Use targeted blood tests, imaging, cultures or cancer and neurological pathways according to the dominant features.
Overview
Recognise common benign flexibility and recurrent nocturnal limb pain while identifying the minority with inflammatory, neurological, malignant, metabolic or heritable connective-tissue disease, and manage function without unnecessary restriction.
Children are naturally more flexible than adults, and joint range varies with age, sex, ancestry, training and the joint examined. Generalised joint hypermobility is therefore a physical descriptor rather than a disease. Ask whether flexibility causes pain, recurrent injury, instability, fatigue or loss of participation. A child who can perform unusual movements but has no symptoms or impairment usually needs explanation and healthy-activity advice, not a medical label or restrictions.
The Beighton score samples passive fifth-finger and thumb movement, elbow and knee hyperextension and forward trunk flexion. It helps communicate generalised flexibility, but it omits shoulders, hips, ankles and other symptomatic sites and changes as children mature. Record the manoeuvres and the child's age rather than treating one threshold as proof of a syndrome. Examine muscle strength, balance, gait, feet, skin, scars and body proportions and check for joint swelling or focal tenderness.
Aetiology
01
Normal developmental flexibility
Ligamentous laxity and joint range are greatest in early childhood and often reduce with maturation without disease or intervention.
02
Familial connective-tissue variation
Inherited collagen and extracellular-matrix variation contributes to flexibility, while only a minority meet criteria for a defined heritable disorder.
03
Mechanical control factors
Reduced strength, endurance or proprioception can make a flexible joint symptomatic even when its anatomical range is not extreme.
04
Uncertain nocturnal pain mechanism
Growing pains have no proven relation to growth and may reflect activity, pain processing or mechanical factors in susceptible children.
Pathophysiology
1
Increased joint excursion
More compliant passive restraints permit movement towards end range, increasing reliance on active muscular stabilisation during daily tasks.
2
Proprioceptive and endurance load
Imprecise joint-position sense and early muscle fatigue can produce inefficient movement, repeated microstrain and perceived instability.
3
Deconditioning cycle
Pain-related avoidance reduces strength and confidence, so ordinary activity feels harder and reinforces further avoidance and fatigue.
4
Benign recurrent pain pattern
Growing pains produce episodic bilateral discomfort without inflammation, structural injury, morning impairment or progressive loss of function.
Clinical features and red flags
Asymptomatic hypermobility
Joint range exceeds peers but the child has normal strength, stable function and no meaningful pain or recurrent injury.
Symptomatic mechanical pattern
Activity-related muscle or joint pain, fatigue, sprains and poor balance occur without persistent inflammatory swelling or morning stiffness.
Classic growing pains
Bilateral poorly localised leg aching occurs in evening or night, resolves by morning and leaves examination and gait normal.
Inflammatory pattern
Morning stiffness, warm swollen joints and persistent restriction require rheumatology-aware evaluation rather than reassurance.
Systemic disease patternRed flag
Fever, weight loss, pallor, bruising, lymphadenopathy or focal persistent night pain requires urgent medical assessment.
Neuromuscular patternRed flag
Regression, objective weakness, Gowers manoeuvre or altered reflexes indicates a neurological pathway rather than flexibility alone.
Red flags requiring action
Unilateral, focal or progressively worsening pain is not the usual growing-pains pattern.
Limp, refusal to bear weight or pain during normal daytime activity requires assessment rather than reassurance.
Investigations
01First-line history and full examinationFirst stepFirst line
Why
Define timing, laterality, function and red flags, then examine gait, joints, bones, power, reflexes, skin and systemic signs.
Interpretation and limitations
A classic bilateral nocturnal pattern with a normal examination supports no-testing reassurance; any abnormality directs investigation.
02Beighton score with context
Why
Record standardised flexibility manoeuvres alongside age, sex, symptomatic joints, skin findings and functional impact.
Interpretation and limitations
A high score demonstrates generalised range but neither proves a syndrome nor explains every symptom.
03Targeted full blood count and film
Why
Investigate pallor, bruising, fever, weight loss, bone pain or systemic illness for cytopenia, leukaemia or infection.
Interpretation and limitations
Abnormal cell lines or film need urgent paediatric or haematology review; a normal result does not resolve focal structural symptoms.
04Targeted inflammatory markers
Why
Use CRP and ESR when joint swelling, morning stiffness, fever or persistent focal pain suggests inflammation or infection.
Interpretation and limitations
Raised values support escalation, while normal values must be interpreted against examination, timing and disease suspected.
Differential diagnosis
01
Inflammatory arthritis
Persistent swelling, warmth, restricted movement and morning stiffness suggest juvenile idiopathic arthritis rather than benign flexibility or growing pains.
02
Infection or malignancy
Fever, focal bone pain, weight loss, pallor, bruising, lymphadenopathy or night sweats needs urgent blood and imaging assessment.
03
Metabolic bone disease
Bowing, delayed growth, fracture, muscle weakness or dietary and malabsorption risk suggests rickets or another mineral disorder.
04
Neuromuscular disease
Regression, Gowers manoeuvre, objective weakness, calf enlargement, abnormal reflexes or loss of milestones requires neurological investigation.
05
Heritable connective-tissue disorder
Skin fragility, abnormal scars, recurrent dislocations, vascular or ocular signs and a concerning family history justify specialist phenotyping.
Management
01Classic growing painsReassure with a diagnostic boundaryFirst stepPain is bilateral, evening or nocturnal, absent by morning and examination and daytime function are normal.+
1Explain that the episodes are benign, are not caused by growth and often fluctuate over months before resolving.
2Use massage, warmth, sleep support and occasional age-appropriate simple analgesia when discomfort requires it.
3Provide written return advice for unilateral, morning or focal pain, limp, swelling, weakness, fever, bruising or weight loss.
02Symptomatic hypermobilityRestore control and capacityFlexibility is associated with recurrent mechanical pain, fatigue, sprains, instability or functional difficulty.+
1Identify the activities and joints that matter, explain that symptoms are real but do not necessarily mean damage, and agree functional goals.
Complications
01
Recurrent sprain or instability
Poor dynamic control can permit repeated soft-tissue injury, joint giving way and episodic functional activity limitation.
02
Deconditioning and persistent pain
Avoidance, poor sleep and anxiety can magnify pain and fatigue even after the initial tissue irritation settles.
03
School and participation loss
Pain, handwriting difficulty or fear of injury can reduce attendance, physical education, friendships and age-appropriate independence.
04
Delayed serious diagnosis
Applying benign labels to focal, unilateral, systemic or progressive symptoms can postpone treatment of infection, cancer or inflammatory disease.
Monitoring and follow-up
Track function through school attendance, sleep, walking, play, self-care and personally meaningful activities rather than pain score alone.
Review whether exercise is graded and sustainable; large boom-and-bust increases commonly worsen fatigue and avoidance.
Re-examine any new persistent swelling, focal tenderness, weakness or gait change even after a benign diagnosis was previously made.
Record analgesic frequency and reassess the diagnosis if medicine is needed regularly or at increasing doses.
For physiotherapy, monitor strength, balance, proprioception, confidence and return to participation instead of trying to reduce the Beighton score.
Use school adjustments temporarily and review them so support does not become unnecessary long-term exclusion from physical activity.
Follow specialist recommendations for cardiovascular, ocular, skin or genetic surveillance only when phenotype or diagnosis supports it.
Keep a clear re-entry plan for families because growing-pains symptoms may recur but should retain the same benign pattern.
Special situations
Flexibility is not illness
A child with unusual range but no pain, instability or impairment usually needs healthy activity advice rather than restriction.
Beighton samples, not diagnoses
The score omits several joints and cannot establish cause, tissue disorder or the source of a child's pain.
Growing pains spare the morning
Complete morning comfort and normal daytime gait are defining reassurance features, not incidental details.
Strength protects flexible joints
Dynamic muscle control and proprioception improve stability more usefully than habitual splinting or avoidance of normal movement.
A changed pattern changes diagnosis
New focal, unilateral, systemic or neurological features require fresh assessment even after years of benign episodes.
Common pitfalls
01
Calling any leg pain in a child growing pains.
02
Using a Beighton threshold as proof of a genetic syndrome.
03
Attributing objective swelling, weakness or morning stiffness to hypermobility.
04
Ordering broad blood panels for a classic benign pattern without a clinical question.
05
Providing reassurance without explicit red flags and follow-up access.
06
Using prolonged rest, routine braces or physical-education exclusion as default care.
07
Escalating regular analgesia without rechecking the diagnosis and rehabilitation plan.
08
Missing tissue fragility, vascular history or developmental regression because flexibility appears common.
Practice
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Paediatrics and child healthOriginal SBA
Classic growing pains
A healthy 7-year-old has intermittent aching in both calves at night after active days. The pain is gone each morning, gait and examination are normal and there are no systemic symptoms. What is the most appropriate approach?
Sources and review status5 sources · checked 27 Aug 2026 · clinical review pending+
Sources
Sources and review status
National guidance is shown before implementation-dependent detail. Typical adult dose examples remain subject to patient factors, contraindications and the live BNF or specialist protocol. Source check completed 27 Aug 2026; clinical approval remains outstanding.
NHS joint hypermobility syndromeSymptoms, Beighton assessment, self-management, physiotherapy and indications for clinical review.
In symptomatic hypermobility, pain is commonly mechanical and activity related. Reduced muscle endurance and proprioceptive control can expose joints to repeated end-range loading, causing sprains, transient soft-tissue irritation and apprehension. Fatigue, sleep disturbance, anxiety and school avoidance can amplify disability without implying tissue damage. Persistent swelling, prolonged morning stiffness or objective weakness is not explained adequately by benign hypermobility and requires another diagnosis.
Assessment should be functional and developmentally informed. Ask about falls, handwriting, dressing, sport, school attendance, sleep and recovery after activity. Document dislocations, fractures, bruising, wound healing, skin texture, autonomic symptoms and bowel or bladder complaints without automatically unifying every symptom under hypermobility. Review family history for diagnosed connective-tissue disease, aortic disease, arterial rupture, sudden unexplained death, severe early osteoarthritis or recurrent dislocations.
Growing pains are a characteristic recurrent pain pattern, not a diagnosis for every unexplained leg pain. The typical child is otherwise well and active, has bilateral poorly localised calf, shin, thigh or popliteal aching in the evening or night, may wake from sleep, and is completely comfortable with normal gait by morning. Episodes come and go over months. Examination between episodes is normal, with no focal bone tenderness, joint inflammation, weakness or systemic sign.
The name is misleading: growing pains are not caused by bones growing. The mechanism is uncertain, and episodes may be more common after active days or in flexible children. A classic history and normal examination require no blood test or imaging. Explain that the condition is harmless and self-limiting while preserving a route back to care if the pattern changes. Repeated low-value investigations can increase anxiety and create incidental findings.
Red flags define the boundary of reassurance. Unilateral or precisely localised pain, persistent morning symptoms, pain during ordinary activity, limp, refusal to bear weight, joint swelling, fever, weight loss, pallor, unusual bruising, night sweats, focal night pain that persists in daylight, back pain, weakness, regression or abnormal reflexes require targeted investigation. Consider injury, infection, juvenile idiopathic arthritis, leukaemia or bone tumour, vitamin D deficiency or rickets, neuromuscular disease and non-accidental injury according to context.
When investigation is indicated, begin with the diagnostic question. Focal tenderness or trauma may require radiographs; fever and acute functional loss require full blood count, inflammatory markers, cultures and infection imaging; bruising, pallor or systemic features require a blood count and film; proximal weakness may require creatine kinase and neurological assessment. Calcium, phosphate, alkaline phosphatase, vitamin D, renal and thyroid tests are reserved for compatible clinical or growth features rather than ordered automatically.
Management of symptomatic hypermobility emphasises capacity. A physiotherapist can build strength around vulnerable joints, proprioception, balance, stamina and confidence through graded practice. Pacing alternates activity and recovery without stopping participation. Supportive footwear, temporary taping or a targeted orthosis may help a defined problem, but routine long-term splinting risks weakness. Occupational therapy can address handwriting, self-care and school ergonomics when these are genuine barriers.
Pain care combines education, sleep, warmth, massage and limited simple analgesia. Avoid repeated opioid prescribing and an escalating search for structural damage when examination remains reassuring. If pain has become persistent and disabling, use a multidisciplinary biopsychosocial plan while rechecking the diagnosis: rehabilitation, school reintegration and coping skills are therapeutic, not dismissal. Specialist genetics, rheumatology, neurology or paediatrics is chosen by objective features rather than by flexibility alone.
Key points
Generalised joint hypermobility describes movement beyond the expected range for age, sex and background. It is common in children and is not a disorder when painless and functionally harmless.
A Beighton score standardises selected joint movements but is not a diagnosis by itself; interpret it alongside age, symptoms, other joints, skin and tissue features and functional effect.
Symptomatic hypermobility may cause activity-related pain, fatigue, recurrent sprains, instability, poor proprioception and coordination difficulty, yet pain severity does not correlate reliably with flexibility score.
Growing pains are recurrent bilateral aching or throbbing leg pains in children, usually aged 3 to 12 years, occurring in the evening or night and disappearing by morning with a normal examination.
Growing pains are not caused by physical growth. The diagnosis is clinical and should not be used for unilateral, focal, morning or activity-limiting pain, limp, swelling, weakness, systemic illness or abnormal examination.
No investigation is needed for a classic growing-pains pattern or uncomplicated asymptomatic hypermobility. Tests should answer a specific alternative diagnosis rather than provide an indiscriminate screen.
First-line symptomatic hypermobility management is education plus graded strength, endurance, balance and proprioception work, usually supported by paediatric physiotherapy when function is affected.
Encourage normal school, play and low-impact exercise with pacing; prolonged rest, routine braces and fear-based activity avoidance can worsen deconditioning and disability.
For growing pains, use reassurance, massage, warmth and occasional child-appropriate paracetamol or ibuprofen if necessary, while giving explicit advice about red flags and reassessment.
Marked skin fragility or hyperextensibility, atrophic scars, recurrent atraumatic dislocations, unusual fractures, marfanoid or vascular features, significant developmental regression or a concerning family history needs specialist assessment.
Fever, weight loss, pallor, unusual bruising, lymphadenopathy or night sweats raises concern for infection or malignancy.
Focal night pain that continues into daytime or produces local bony tenderness warrants imaging and blood tests.
Fragile or very stretchy skin, atrophic scars, recurrent atraumatic dislocations or vascular and ocular features suggests a connective-tissue disorder.
A family history of arterial rupture, aortic disease or sudden unexplained young death requires specialist assessment.
05
Site-specific radiography or MRI
Why
Image trauma, focal tenderness, persistent unilateral pain, limp or suspected infection or tumour according to urgency.
Interpretation and limitations
Normal early radiographs do not exclude infection, stress injury or malignancy when clinical concern persists.
06Directed CK and neuromuscular tests
Why
Measure creatine kinase and seek paediatric neurological input for objective weakness, regression or Gowers manoeuvre.
Interpretation and limitations
A substantial CK rise supports muscle disease, but normal CK does not exclude every neurological disorder.
07Directed bone and endocrine profile
Why
Check calcium, phosphate, alkaline phosphatase, vitamin D, renal or thyroid tests when growth, deformity, fracture or dietary features justify them.
Interpretation and limitations
Interpret age-specific alkaline phosphatase and the whole biochemical pattern rather than a vitamin D value in isolation.
2
Use graded strengthening, endurance, balance and proprioception training, with paediatric physiotherapy or occupational therapy when impairment warrants it.
3Maintain school and activity using pacing and temporary targeted support, then review objective function rather than flexibility score alone.
03Atypical painInvestigate the red flag, not the labelPain is focal, unilateral, morning-predominant, progressive or accompanied by abnormal examination or systemic features.+
1Localise the concern through repeat musculoskeletal, neurological, skin, abdominal and lymph-node examination.
2Order blood tests and imaging that answer the leading differential and use urgent infection, cancer or neurology routes when indicated.
3Keep follow-up ownership until symptoms resolve or a diagnosis is established; do not return to a benign label after an unexplained abnormality.
04Connective-tissue concernRefer by objective phenotypeThere is tissue fragility, abnormal scarring, recurrent dislocation, unusual fracture, vascular or ocular involvement or a strong family history.+
1Document skin, scars, body proportions, dislocations, fractures and three-generation cardiovascular and connective-tissue history.
2Arrange paediatric or clinical-genetics assessment and organ-specific cardiology or ophthalmology review according to findings.
3DefinitiveAvoid assigning a definitive hereditary syndrome from hypermobility alone, especially while the child's phenotype is still evolving.
Key medicines and prescribing safety2 treatments · regimens, roles and cautions+
Provides occasional relief during a painful growing-pains episode or short mechanical flare while non-drug measures are used.
Paracetamol
Use the current BNFC age- or weight-specific oral dose only when needed, with the correct formulation, interval and daily maximum.
Check all products for duplicate paracetamol, adjust where hepatic risk requires it and reassess frequent use because regular analgesic need is atypical.
Can relieve more troublesome nocturnal or mechanical pain and support sleep and activity during a short flare.
Ibuprofen
Use the current BNFC age- or weight-specific oral dose for occasional short-term pain when an NSAID is suitable.
Avoid with dehydration, significant renal disease, gastrointestinal bleeding, NSAID hypersensitivity or sensitive asthma; do not use to suppress undiagnosed persistent symptoms.