Always feel wet knees may be related to synovitis, rheumatoid arthritis, outside cold and other reasons, can be treated by oral medication and hot compresses and other ways. 1. Synovitis: Synovitis may be related to infection, trauma, immunity and other factors. Patients will experience redness, swelling, burning, and pain around the joints, and some of them will experience increased pain during activities, and will also feel a coldness in their knees. Non-steroidal anti-inflammatory drugs, such as ibuprofen extended-release capsules and celecoxib capsules, can be taken under the guidance of a doctor. 2. Rheumatoid arthritis: Rheumatoid arthritis may be related to autoimmunity, heredity, infection, smoking and other factors. Patients will have high fever, fatigue, general discomfort, and may also have joint swelling, pain, and in severe cases, patients will feel cold knees. You can take methotrexate tablets and diclofenac sodium extended-release tablets under the guidance of your doctor. 3. Cold environment: It is also possible that the outside environment is relatively cold caused by the knee wet cold, generally can be treated by hot compresses, but also under the guidance of the doctor, the rational use of blood circulation drugs to assist in the treatment, so as to achieve the purpose of alleviating the condition. And in normal times must pay attention to the affected area of the warm work. Usually pay attention to the body to keep warm, can be appropriate to do some physical exercise to improve the body’s resistance, diet can eat some eggs, milk and other foods containing high protein. If the condition has not been relieved for a long time, you should go to the hospital in time for the next step of treatment.