The possible reasons for more pain after microwave treatment of the knee include fluid accumulation in the joint cavity, aggravation of the primary disease, etc. Microwave treatment can be suspended, and the knee can be treated by analgesic medication such as ibuprofen and extraction of fluid accumulation. 1. Painkillers: If the knee becomes more painful after microwave treatment, analgesic and anti-inflammatory drugs can be used to relieve the symptoms of severe pain, such as ibuprofen, naproxen, acetaminophen, aspirin, etc. All of the above medications may cause digestive discomfort and other side effects after taking the medication. 2. Surgical extraction of fluid: the knee is more painful after microwave treatment, which may be due to the presence of fluid in the joint cavity that has not been absorbed, or the increase of fluid after microwave treatment, resulting in increased local pain. If the amount of fluid is large, surgery can be considered to extract the fluid in the joint cavity, to relieve the pressure in the cavity and relieve pain. 3. Reduce walking and weight-bearing: knee after taking microwave therapy more pain, it is recommended that patients should try to bed rest, reduce walking and other activities, try to avoid causing pressure on the knee joint. Knees with microwave treatment after more pain, it is recommended to go to the regular hospital in a timely manner to find out the cause, active treatment, do not blindly use drugs.