Osgood–Schlatter disease is a common cause of knee pain in active children and teenagers, felt at the bony bump just below the kneecap. It happens when the strong thigh muscles repeatedly pull on a growth area at the top of the shin bone. It usually improves as growth finishes, but symptoms can last months or longer, so a planned approach to activity and strengthening is worthwhile.
Also known as Osgood-Schlatter, tibial tubercle apophysitis, Osgood's
Symptoms
- Pain and tenderness at the bump just below the kneecap
- A visible or growing bony lump at the top of the shin
- Pain with running, jumping, kneeling, squatting or stairs
- Pain that eases with rest and flares after sport
- One or both knees can be affected
Causes and risk factors
- Repeated pulling of the patellar tendon on a growth plate at the top of the shin
- Periods of growth, when bone, tendon and muscle are adapting
- High volumes of running, jumping and kicking sports
- Sudden increases in training or matches
- Lower thigh (quadriceps) strength and tight thigh muscles have been linked to it
What the evidence says helps
- Education plus a step-by-step 'activity ladder', pain monitoring and progressive knee and hip strengthening was linked with most young people reporting improvement within 12 weeks and at 12 months in a prospective study.2
- Reducing, rather than stopping, painful activities while keeping active is the most commonly recommended first step. Systematic reviews find conservative (non-surgical) care is the usual approach, although high-quality trials comparing specific exercises are still lacking.15
- Healthcare professionals internationally agree that education, exercise therapy and managing training load are central to care.4
- Symptoms do not always settle quickly. Around a third of young people in one cohort still had knee pain two years later, which is why ongoing support and gradual return to sport matter.3
- Surgery is rarely needed and is generally only considered for adults with ongoing pain after growth has finished.5
Things you can try at home
- Keep a simple pain diary and reduce activities that push pain above a mild, settling level
- Swap some high-impact sessions for cycling or swimming for a few weeks
- Use a cushion or pad when kneeling
- Ice or a cool pack after sport can ease soreness
- Build back to full training gradually rather than all at once
When to get urgent help
Contact your GP urgently, call NHS 111, or call 999 in an emergency if you have:
- The knee is hot, red or very swollen, or your child has a fever – see a GP the same day or call NHS 111
- Sudden severe pain or inability to straighten the knee or bear weight after jumping or a fall – go to A&E
- Pain at night or at rest that is getting worse, or unexplained weight loss – see a GP urgently
- A limp with hip or thigh pain – hip problems can cause knee pain and need a GP check
How Apollo can help
We assess your child's knee, growth stage and training load, explain the condition in plain language and agree a realistic activity plan with them and their family. Care may include a progressive strengthening programme, load management advice for coaches, and gentle hands-on care where appropriate. If anything suggests a different diagnosis, we refer to the GP.
No GP referral needed. Clinics in Sheringham, Coltishall and Norwich.
Related reading
Frequently asked questions
Does my child have to stop playing sport with Osgood–Schlatter?
Usually not completely. Most young people do best by reducing the most painful activities for a while and building back up gradually, guided by pain levels. Total rest is rarely needed.
How long does Osgood–Schlatter last?
It often settles over many months and usually resolves when growth finishes. Some young people have pain for a year or two, so a structured plan helps.
Will the bump below the knee go away?
The bony lump often stays, but it is usually painless once the condition settles. Some adults notice discomfort when kneeling.
References
- Neuhaus C, et al. (2021). A systematic review on conservative treatment options for Osgood-Schlatter disease. Physical Therapy in Sport. View source
- Rathleff MS, et al. (2020). Activity modification and knee strengthening for Osgood-Schlatter disease: a prospective cohort study. Orthopaedic Journal of Sports Medicine. View source
- Holden S, et al. (2021). Is the prognosis of Osgood-Schlatter poorer than anticipated? A prospective cohort study with 24-month follow-up. Orthopaedic Journal of Sports Medicine. View source
- Lyng KD, et al. (2020). Current management strategies in Osgood Schlatter: a cross-sectional mixed-method study. Scandinavian Journal of Medicine & Science in Sports. View source
- Ladenhauf HN, et al. (2020). Osgood-Schlatter disease: a 2020 update of a common knee condition in children. Current Opinion in Pediatrics. View source
This page is general information, not a diagnosis or a substitute for medical advice. If you are worried about your symptoms, speak to your GP or a registered healthcare professional. Content prepared from the sources above, November 2026.
