First, you should keep your joints as warm as possible by applying hot water bags or placing them close to a heater. Secondly, the activities of the joints should be appropriately reduced for a period of time, i.e., reduce walking, running and hiking, climbing stairs, and let the joints rest as much as possible to facilitate the repair of the joints. Third, take some non-steroidal anti-inflammatory drugs or use local anti-inflammatory and pain-relieving creams and ointments while paying attention to prevent skin allergy. If the above methods still do not make the knee pain better, it is important to visit a hospital for a clear diagnosis. In addition to the chronic knee injury mentioned above, knee pain can also be caused by knee synovitis, osteoarthritis, meniscal injury, knee ligament injury, knee infection and tumor, etc. These knee diseases cannot be cured by health care alone.