If your knee is red, swollen, sore, or warm to the touch, it is inflamed. Inflammation in the knee can be caused by a lot of different conditions, such as arthritis, tendinitis, bursitis, or an injury to the muscles or tendons around the knee. Once the knee is injured, inflammation begins as the knee starts to heal itself.

Treating minor inflammation in the knee can usually be done at home with some general care and lifestyle changes. However, if you have ongoing or intense inflammation, you should seek out medical care.