Self-heating knee pads certainly have side effects, because in this case, if they are not used properly they can cause localized overheating and cause burns to the skin. Patients are advised to read the instructions in detail before using the knee pad and to wrap it locally before applying it directly to the skin of the knee joint. This can effectively avoid skin burns on the knee joint due to the high temperature of the heat. If the burns are not treated in time, they may lead to local infection. Therefore, it is recommended that patients with osteoarthritis of the knee or rheumatoid arthritis aggravate this joint pain when exposed to local cold. If you want to keep your joints warm, it is recommended that you wear more clothes or use knee pads without self-heating, which can effectively improve the side effects of these self-heating knee pads.