There are three different types of arthritis that can occur in your knees. The most common type is osteoarthritis (OA), a progressive condition that slowly wears away joint cartilage. OA is most likely to occur after middle age.
Rheumatoid arthritis (RA) is an inflammatory condition that can strike at any age.
Post-traumatic arthritis develops following an injury to the knee. It can occur years after a torn meniscus, ligament injury, or knee fracture.
It’s possible to have more than one type of arthritis at a time. See your doctor for a diagnosis and to discuss a successful treatment plan for the specific type or types of arthritis you have.
Gradual increase in pain
Arthritis pain can begin suddenly, but it’s more likely to develop slowly. At first, you may notice pain in the morning or after you’ve been inactive for a while. Your knees may hurt when you climb stairs, stand up from a sitting position, or kneel. It may hurt just to go for a walk.
You may also feel pain when you’re simply sitting down. Some people with arthritis say that damp weather or other changes in weather can bring on pain. Knee pain that wakes you up from sleep can be a symptom of OA.