Osteoarthritis (OA) is the most common joint condition. It affects the whole joint—not only cartilage—including bone, lining, ligaments and surrounding muscles. In the knee it may cause pain, stiffness, reduced confidence and difficulty with stairs, walking or rising from a chair.
It is often called “wear and tear” or “loss of grease,” but those phrases are incomplete. OA is an active joint process, and symptoms do not always match the amount of change visible on an X-ray.
Typical symptoms
- Pain related to activity, often relieved by rest in early disease
- Brief stiffness after waking or sitting, usually under 30 minutes
- Grinding or crackling (crepitus)
- Reduced movement, muscle weakness or a feeling that the knee may give way
- Intermittent swelling
- In advanced disease, pain at rest or visible change in alignment
Persistent swelling, prolonged morning stiffness, fever, a hot red joint, recent injury, locking, or inability to bear weight needs medical assessment because another diagnosis may be present. Compare OA with rheumatoid arthritis, which is an immune-mediated inflammatory disease.
Who is at higher risk?
Risk increases with age, previous knee injury, repeated heavy joint loading, family tendency, muscle weakness and excess body weight. OA is more common after menopause, but it can affect any sex. Body weight is modifiable: even modest, sustained weight loss can improve pain and function, and around 10% may help more than 5% for some people.
Normal daily activity is not automatically harmful. Rather than banning stairs, squatting or sitting on the floor for everyone, adjust the depth, load and frequency according to pain and function, and rebuild strength progressively.
How it is diagnosed
In adults aged 45 or over with activity-related joint pain and no more than 30 minutes of morning stiffness, OA can often be diagnosed clinically. An X-ray is not always required. Imaging may be useful when symptoms are atypical, injury is suspected, another diagnosis is possible, or surgery is being planned.
X-ray grades describe structural change, but treatment decisions should be based mainly on pain, function, quality of life and the person’s goals—not the grade alone.
Core treatment: information, exercise and weight management
Therapeutic exercise
Strengthening the quadriceps, hips and core plus regular aerobic activity are central treatments. Walking on a tolerable surface, cycling, swimming and water exercise are common options. A physiotherapist can adapt exercises for balance, deformity, previous injury or severe pain.
It is normal to notice some discomfort when beginning exercise. A gradual programme should improve function over time. Sudden severe pain, major swelling or symptoms that remain markedly worse need review.
Weight management
If weight is above a healthy range, a realistic nutrition and activity plan can reduce knee symptoms and improve blood pressure and diabetes risk. Avoid crash diets and “joint detox” products.
Helpful supports
Comfortable footwear, pacing, a walking stick used on the opposite side, or a selected brace may help some people. Insoles and braces are not routinely needed for everyone.
Medicines and injections
For knee OA, a topical NSAID gel is often considered before oral painkillers. Oral NSAIDs may help but require assessment of stomach, kidney, heart, blood-pressure and medicine-interaction risks. Use the lowest effective dose for the shortest suitable time under clinical guidance.
Intra-articular corticosteroid injection can provide short-term relief when other measures are unsuitable or insufficient, but it is not a cure. NICE advises against routinely offering hyaluronan (“lubrication”) injections for OA because consistent clinical benefit has not been shown.
Opioids and unproven supplements are not routine long-term solutions. Glucosamine is not recommended by NICE for OA management.
When is knee replacement considered?
Referral for joint replacement is reasonable when pain, stiffness or reduced function substantially affect quality of life and good non-surgical management has not helped enough. Age, weight or X-ray grade alone should not be used to deny referral. An orthopaedic surgeon discusses expected benefits, risks and rehabilitation.
Frequently asked questions
Can oil, food or supplements regrow completely worn knee cartilage?
No proven oil, food or supplement reliably regrows severely lost cartilage. Exercise, weight management, symptom control and appropriate aids can still improve function and quality of life.
Should I use heat or ice for knee osteoarthritis?
Warmth may ease chronic stiffness, while a wrapped cold pack can help after activity or during a swollen flare. Protect the skin and use whichever safely improves your symptoms.
Do calcium and vitamin D treat osteoarthritis?
They do not treat cartilage loss. They may be prescribed for deficiency or bone-health indications after an individual assessment.
Where can I get knee-pain assessment in Patna?
Dr. Pratyush Kumar can assess the pattern of pain, weight and metabolic factors, review medicines, start primary care management, and coordinate physiotherapy, imaging or orthopaedic referral when indicated. Request an appointment.
Medical references
- NICE osteoarthritis guideline NG226
- American College of Rheumatology/Arthritis Foundation OA guideline
This article is for health education and does not replace an individual medical consultation. Symptoms, test results, medicines, and treatment decisions should be discussed with a qualified clinician.
Seek urgent medical care for severe breathing difficulty, chest pain, confusion, fainting, uncontrolled bleeding, severe dehydration, or rapidly worsening symptoms.