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Knee condition

Knee Osteoarthritis

Also called: Knee Arthritis

Knee osteoarthritis is the gradual wearing down of the cartilage that cushions the knee joint, which lets the bones rub together. It is the most common form of knee arthritis and develops slowly with age, causing pain, stiffness and swelling that is worst after rest and eases with gentle movement. It cannot be reversed, but the symptoms can be managed.

Symptoms

Knee osteoarthritis usually builds slowly over months or years. Common signs include:

  • A deep, aching pain that is worst after rest or at the end of the day
  • Morning stiffness that eases within about 30 minutes of moving
  • Grinding, clicking or a catching feeling when you bend the knee
  • Swelling and warmth after activity
  • A tight knee that will not fully straighten or bend
  • Weakness or a sense the knee might give way

Causes

Osteoarthritis happens when the protective cartilage wears down faster than the body can maintain it. Common contributors:

  • Age-related cartilage wear - the most common cause
  • A previous knee injury, such as a meniscus tear or ligament damage
  • Carrying extra weight, which adds load to the joint
  • Repetitive stress from certain jobs or sports
  • A family history of osteoarthritis
  • Joint misalignment (bow-legged or knock-kneed)

What helps knee osteoarthritis?

There is no cure for knee osteoarthritis, but the right mix of habits keeps it manageable. Low-impact strengthening, weight management and drug-free pain relief all reduce day-to-day pain - and consistency matters more than any single treatment. A knee pain patch worn over the joint gives steady, medication-free relief you can wear under clothing, and a supportive knee brace adds stability during activity.

  • Strengthen the muscles around the knee (quads and hamstrings)
  • Keep moving with low-impact exercise - cycling, swimming, walking
  • Manage your weight to reduce load on the joint
  • Use drug-free relief - a knee pain patch over the joint
  • Add stability during activity with a knee brace for arthritis
  • Use warm or cold therapy to calm flare-ups
Shop the knee pain patch Browse knee braces

Frequently asked questions

Is knee osteoarthritis the same as knee arthritis?
Knee osteoarthritis is the most common type of knee arthritis, so the two terms are often used interchangeably. Osteoarthritis is the wear-and-tear form, where cartilage breaks down over time. Other types, like rheumatoid arthritis, are driven by the immune system rather than mechanical wear. When people say knee arthritis, they usually mean osteoarthritis.
Can knee osteoarthritis be reversed?
No. The cartilage lost to knee osteoarthritis does not grow back, so the condition cannot be reversed. But strengthening the muscles around the knee, managing weight, staying active and using drug-free pain relief can slow its progression and meaningfully reduce pain - often delaying or avoiding surgery for years.
What is the best exercise for knee osteoarthritis?
The best exercises are low-impact and strengthen the muscles that support the joint without loading the worn cartilage. Straight-leg raises, seated leg extensions, cycling and swimming are ideal. Aim for gentle, regular movement most days rather than occasional intense sessions, and avoid deep squats, running and jumping.
Should you rest or exercise with knee osteoarthritis?
Gentle exercise is usually better than rest. Too much rest lets the supporting muscles weaken, which puts more strain on the joint. The goal is low-impact movement that keeps the knee mobile without overloading it. During a painful flare-up, ease off and use ice or a pain patch, then return to gentle activity.
When should you see a doctor?
See a doctor if knee pain is severe, lasts more than a few weeks, or stops you doing everyday activities. Seek prompt care if the knee locks, gives way, or becomes suddenly hot, red and swollen, which can signal infection or another problem that needs different treatment.
A quick, honest note. This guide is for general education and does not replace a diagnosis from a qualified clinician. mLab makes natural pain-relief patches and support devices - they can ease day-to-day discomfort, but they do not treat or cure osteoarthritis. If pain is severe, sudden, or comes with swelling, warmth or the knee giving way, please see a doctor.