🦵 Men's Health
Osteoarthritis of the Knee (Nigeria Guide)
Managing knee wear-and-tear arthritis — exercise, weight loss, and when to consider joint replacement
Osteoarthritis (OA) of the knee is the most common joint disease in adults over 50 in Nigeria. It results from breakdown of the cartilage that cushions the knee joint, leading to bone-on-bone friction, pain, and stiffness. OA is not simply 'old age' — obesity, previous injury, and genetics play important roles. Most Nigerians with knee OA are undertreated, relying on analgesics and steroid injections while missing the most effective interventions: weight loss and targeted exercise.
Signs and Symptoms
✓ Knee pain worsening with activity (walking, climbing stairs) and easing with rest
✓ Morning stiffness lasting less than 30 minutes (unlike RA's 1+ hour)
✓ Crepitus — creaking, grating, or clicking sensation in the knee
✓ Bony swelling and deformity — bow-legs (varus deformity) in medial compartment OA
✓ Reduced range of motion — difficulty fully straightening or bending the knee
✓ Soft swelling with effusion (water in the knee) during flares
✓ Pain at rest or at night in severe OA
✓ Difficulty squatting, kneeling for prayer, or sitting cross-legged — activities of daily life in Nigeria
Risk Factors
- Age over 50 years
- Obesity — the most modifiable risk factor; each kg of weight lost reduces knee load by 4 kg
- Female sex — particularly postmenopausal women (reduced joint protection from oestrogen)
- Previous knee injury — anterior cruciate ligament tear, meniscal injury
- Occupations involving kneeling or squatting — farmers, artisans, traders
- Quadriceps muscle weakness — weak thigh muscles fail to protect the joint
- Family history of OA
- Genu varum (bow-legs) or genu valgum (knock-knees) — altered joint mechanics
When to Seek Help
Same daySudden severe knee swelling, locking, or inability to weight-bear after minor trauma — possible fracture or meniscal tear
UrgentHot, red, swollen knee with fever — possible septic arthritis or gout, both requiring urgent treatment
Within 1 weekKnee giving way (instability) — ligament or meniscal pathology needs assessment
SoonOA not responding to paracetamol and exercise — review of management including physiotherapy referral
RoutineBilateral severe knee OA limiting daily activities — discuss surgical options (arthroplasty)
Book appointmentSteroid injections repeated more than 3 times per year — risks outweigh benefits, time to reassess
Tests & Diagnosis
🧪 X-ray of both knees (weight-bearing)
Joint space narrowing, osteophytes (bone spurs), subchondral sclerosis, and cysts — the four radiological features of OA. Severity does not always correlate with pain
🧪 MRI knee
Shows cartilage loss, meniscal tears, and bone marrow oedema. Not routinely required for OA diagnosis but useful if meniscal or ligament pathology suspected
🧪 Inflammatory markers (ESR, CRP, RF)
Should be normal in primary OA. Elevated markers suggest inflammatory arthritis (RA, gout) or infection
🧪 Joint aspiration
If effusion present — analysis of synovial fluid distinguishes OA (non-inflammatory), gout (crystals), RA (inflammatory), or septic arthritis (bacteria and white cells)
🧪 BMI and waist circumference
Obesity assessment guides the most impactful intervention — weight loss
Treatment Options
1
Weight loss — the single most effective intervention
Each kilogram lost reduces the force on the knee by 4 kg with every step. Losing 10% of body weight significantly reduces pain and improves function. Diet + exercise is the most effective approach. Even modest weight loss (5 kg) makes a meaningful difference
2
Quadriceps and hamstring strengthening exercises
Strong thigh muscles reduce joint load and protect cartilage. Straight leg raises, wall squats, seated knee extensions — 3 sets of 10, daily. Swimming and cycling build muscle without impact. Evidence is very strong — as effective as anti-inflammatory drugs for pain relief
3
Paracetamol (first-line analgesic)
1 g four times daily. Adequate pain control enables exercise. Reassess after 4 weeks — if inadequate, add NSAID
4
Topical NSAIDs
Diclofenac gel applied to the knee — effective for mild-moderate OA. Better tolerated than oral NSAIDs. Apply twice daily. Ideal for older patients at risk of GI side effects
5
Oral NSAIDs (if topical insufficient)
Ibuprofen 400–600 mg three times daily with food. Celecoxib for those with GI risk. Avoid prolonged use — kidney and cardiovascular risk. Add omeprazole for gastric protection
6
Intra-articular corticosteroid injections
Useful for flares with effusion. Triamcinolone or methylprednisolone injected into the knee joint. Provides 4–8 weeks of relief. No more than 3–4 per year — repeated injections accelerate cartilage damage
7
Knee brace / offloading
Medial unloader brace for predominantly medial compartment OA — shifts load to the less-affected lateral compartment. Physiotherapy assessment needed to determine appropriate brace type
8
Physiotherapy
Gait training, taping, manual therapy, and exercise prescription. Hydrotherapy (pool exercise) — highly effective, reduces joint load while building strength. Available at LUTH, UCH, and private centres
9
Glucosamine and chondroitin
Some patients report benefit. Evidence is inconsistent — they are not recommended as standard treatment but are safe to try. If no improvement after 3 months, discontinue
10
Total knee replacement (TKR)
For severe OA causing disability not responding to conservative measures. Life-changing surgery with >90% patient satisfaction. Available at LUTH, UCH, NINR, National Orthopaedic Hospital Igbobi, and some private hospitals. Recovery 6–12 weeks walking, full recovery 6–12 months. Physiotherapy before and after surgery improves outcomes
Frequently Asked Questions
Is it safe to exercise with knee osteoarthritis?
Yes — and it is the most important treatment. The idea that exercise wears out arthritic joints further is a myth. Low-impact exercise (swimming, cycling, walking on flat surfaces) strengthens the muscles that protect the joint and reduces pain. The key is appropriate exercise — a physiotherapist can design a safe programme.
Are steroid injections a long-term solution for knee OA?
No. Steroid injections provide temporary relief (4–8 weeks) and are useful for flares, but repeated injections can damage cartilage. They should complement, not replace, weight loss and exercise. If you need injections more than 3 times per year, discuss surgical options.
Can I kneel for prayers with knee OA?
Many Nigerians with knee OA are concerned about prayer positions. Using a prayer mat with extra cushioning, limiting the duration of floor kneeling, and using a chair or stool alternative for daily prayers can help. Strengthening exercises improve the ability to get up and down from the floor.
When should I consider knee replacement surgery?
When severe knee pain significantly limits daily activities (unable to walk more than a short distance, climb stairs, or perform daily tasks) despite 6 months of appropriate conservative treatment. The decision is quality-of-life based — discuss with an orthopaedic surgeon.
What foods should I eat or avoid for knee OA?
An anti-inflammatory diet is beneficial: omega-3 rich foods (sardines, mackerel, walnuts), colourful vegetables and fruits, whole grains. Reduce processed foods, red meat, and sugary drinks. Weight management is more important than any specific food.
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