Knee Osteoarthritis: Symptoms, Stages and Treatment Options

Knee osteoarthritis is the single most common reason people over 50 come to an orthopaedic clinic. It develops slowly, is often written off as “just old age,” and yet responds well to treatment at every stage if it is recognised early rather than ignored until walking becomes difficult.

What happens in knee osteoarthritis

The knee's cartilage acts as a smooth, shock-absorbing cushion between the thigh bone and shin bone. In osteoarthritis, this cartilage thins and roughens over time, the joint space narrows, and the bone underneath can form spurs. The result is pain, stiffness and, eventually, a change in the shape and alignment of the knee.

Symptoms

• Pain that is worse with activity and improves with rest, in the early stages
• Morning stiffness or stiffness after sitting, lasting under 30 minutes
• A grinding or crunching sensation (crepitus) on bending the knee
• Swelling after a long day on your feet
• Reduced range of motion, and in later stages, a bowed or knock-kneed appearance

If your knee also catches, locks or gave way suddenly after a twisting injury, a meniscus or ligament tear may be involved as well; see our guides on meniscus tears and ACL tears.

How severity is graded

X-rays are graded using the Kellgren–Lawrence system, from 0 (normal) to 4 (severe), based on joint space narrowing and bone spurs. This grade is one input among several; a person's pain and function matter just as much as the picture.

Treatment without surgery

For grades 0 through 3, and even some grade 4 knees, non-surgical care works well for years:

• Weight management: every extra kilogram adds several times that load across the knee with each step
• Exercise: quadriceps and hip strengthening, low-impact cardio (cycling, swimming) and flexibility work
• Medication: pain relief and anti-inflammatory medicines as advised by your doctor
• Bracing or a stick: to offload a painful side of the knee
• Injections: corticosteroid or other image-guided injections for flare-ups in selected patients

Our physiotherapy and rehabilitation service builds a specific programme around your knee's stage and your goals.

When knee replacement becomes the right option

Knee replacement is considered when pain and stiffness limit walking, stairs, sleep or independence, and non-surgical treatment is no longer giving enough relief, usually alongside advanced changes on X-ray. It is one of the most successful operations in orthopaedics for restoring mobility. Our detailed guide on when knee replacement surgery becomes necessary walks through that decision in more depth, and the knee replacement service page covers the procedure itself.

For an independent overview of osteoarthritis in general, see the US NIAMS guide to osteoarthritis.

Everyday habits that protect your knees

• Choose cycling, swimming or an elliptical over running on hard surfaces if pain flares with impact
• Warm up before activity and strengthen the muscles around the knee, not just the knee itself
• Use handrails and take stairs one at a time if the knee is unstable, rather than pushing through
• Wear supportive, well-cushioned footwear

Common myths about knee osteoarthritis

• “Cracking sounds mean damage is getting worse.” Painless crepitus is common and, by itself, does not mean the arthritis is progressing.
• “Exercise wears the joint out faster.” The opposite is usually true; appropriate exercise strengthens supporting muscles and tends to reduce pain.
• “Nothing works except surgery.” Most people spend years managing well with non-surgical care before, if ever, needing an operation.

Questions worth asking your doctor

• Which grade is my knee, and does that match how much it's bothering me day to day?
• What specific exercises are safe and useful for my knee?
• Would an injection help me get through a flare-up or an upcoming trip or event?
• What signs would tell us it's time to discuss knee replacement?

Why knee osteoarthritis is common across Pune and Pimpri-Chinchwad

Knee osteoarthritis shows up often in patients from Wakad, Pimple Saudagar, Ravet and Chinchwad who spend years doing physically demanding work, climbing stairs in homes without lifts, or sitting for long stretches on two-wheelers commuting to Hinjewadi's IT parks. Traditional habits such as sitting cross-legged on the floor and squatting for daily tasks also load the knee joint heavily over decades, which is one reason osteoarthritis tends to appear a little earlier in some patients here than Western population studies would suggest.

None of this means the condition cannot be managed well. It simply means an assessment that takes your actual daily routine, work and home setup into account, rather than generic advice, gives a far more realistic treatment plan.

A typical first-visit assessment

At your first consultation, expect a review of when the pain started, what makes it better or worse, and how it affects your specific routine, followed by an examination of alignment, range of motion, swelling and muscle strength. A standing X-ray of both knees is usually taken, since comparing both sides and viewing the knee under load gives more accurate grading than a scan taken lying down. Based on this, you leave with a specific, staged plan rather than a vague “manage the pain” instruction.

Frequently overlooked contributing factors

• Footwear: worn-out or unsupportive footwear changes how load passes through the knee with every step
• Hip and ankle stiffness: a stiff hip or ankle forces the knee to compensate, so a full assessment looks above and below the joint too
• Uncontrolled diabetes or thyroid disease: these can slow healing and affect surgical planning if replacement is ever needed
• Previous injuries: an old, untreated meniscus or ligament injury can accelerate wear in that knee over the following years

What patients often ask about daily life

Is it safe to keep using Indian-style (squat) toilets? For moderate to severe arthritis, this position loads the knee heavily and a Western-style toilet or a raised seat is usually more comfortable and safer.

Should I stop climbing stairs completely? Not usually; complete avoidance can weaken the muscles further. Using a railing, taking stairs slower and one at a time, and building strength are generally better than avoiding stairs altogether, unless your surgeon has advised otherwise for a specific reason.

Will the other knee be affected too? Because both knees carry the same body weight and often share similar wear patterns, it's common to develop symptoms in both knees over time, which is why we usually X-ray both sides even if only one currently hurts.

Knee specialist in Wakad, Pune

Dr. Nirmal Patil, MS (Ortho), has 16 years of experience treating knee arthritis, from early exercise-based care to knee replacement, at Precision Ortho Spine & Rehab Clinic in Wakad, Pune, for patients across Hinjewadi, Baner, Pimple Saudagar, Balewadi, Ravet and Pimpri-Chinchwad.