There are two main reasons for the pain in the finger joints in the morning: First, because of excessive finger joint activity during the day, the surrounding muscles, ligaments, tendons and joint capsules are in a state of strain and fatigue, which can easily produce a local accumulation of inflammatory metabolites, and during activity, due to better blood circulation, the accumulation of metabolites is not obvious, but during rest time The blood circulation slows down, and if there is a cold situation, it will easily lead to a decrease in blood circulation, and the accumulation of inflammatory metabolites will increase and stimulate the peripheral nerves, and the pain in the finger joints will be felt the next morning. Rheumatoid arthritis, an autoimmune disease, is caused by the immune system’s immune response to its own tissues, resulting in the formation of local inflammatory lesions that stimulate the peripheral nerves and cause pain in the finger joints. Rheumatoid arthritis causes finger pain, usually bilateral symmetrical finger pain, in the morning there is a significant stiffness, after about 30 minutes or activity, the stiffness and pain symptoms can be alleviated.