Itchy knee joint may be caused by synovitis, cartilage wear, osteoarthritis, etc. It can be improved by physical therapy and medication. 1. Knee synovitis: Repeated flexion and extension activities of the knee will stimulate the synovial tissue, causing exudative inflammatory reaction, stimulating the surrounding soft tissue and causing itchiness inside the knee joint. In order to alleviate the symptoms of itching, you can carry out physical therapy such as intermediate frequency electrical stimulation therapy and microwave therapy to accelerate the metabolism of inflammatory substances and reduce inflammation. Anti-inflammatory drugs such as ibuprofen can also be taken as prescribed by the doctor. 2. Wear and tear of cartilage: Wear and tear of the cartilage of the knee joint will cause edema in the cartilage and meniscus, which will lead to itching inside the knee joint. At this time, under the operation of professional doctors, sodium vitrate can be injected into the knee joint to lubricate the cartilage and improve the edema. Physical therapy such as infrared laser therapy and magnetic therapy can also be performed to promote blood circulation and reduce inflammation. At the same time, we should pay attention to keep the knee warm. 3. Osteoarthritis: Cold knees or excessive fatigue can lead to proliferation, degeneration and other changes in the knee cartilage and cause itching inside the knee joint. At this time, infrared laser therapy and other physical therapy to reduce inflammation. You can also take anti-inflammatory drugs such as diclofenac sodium as prescribed by your doctor. When the symptoms of itchy knee joints appear, it is recommended to go to a regular hospital in time to clarify the cause of the disease and carry out targeted treatment.