If there is a burning sensation in the knee, the following diseases should be considered. 1. Infection of the knee joint. The joint will be red, swollen, and hot. The joint fluid will be cloudy after arthrocentesis, and the culture result will be bacterial infection, and the inflammatory index will be increased. 2. Gouty arthritis. It is a metabolic disease, mainly caused by the consumption of large amounts of high purine diet, such as drinking beer, eating seafood and soy products, common foot bunions and knee joints, local burning sensation, severe pain, confirm the diagnosis is mainly to check the blood routine, C-reactive protein, blood sedimentation and blood uric acid, etc. 3, acute synovitis of the knee joint. It is mainly induced by excessive exercise and cold stimulation, local burning is relatively mild, local swelling may be present, which can be relieved after rest and warmth, and in severe cases, oral non-steroidal drugs such as celecoxib capsules can be taken.