No trauma thumb pain, may be due to thumb tenosynovitis, gout, thumb infection, local tumor and so on. 1. Thumb tenosynovitis: due to overstrain, cold and other factors, can lead to localized chronic inflammatory reaction of the thumb, resulting in tenosynovitis, manifested as thumb swelling, pain, thumb flexion and extension restrictions, jamming during activities, and even audible popping. 2. Gout: that is, hyperuricemia, seen in purine metabolism abnormalities, long-term eating a high-purine diet, such as animal offal, seafood, beer and so on, leading to a large accumulation of uric acid in the body, the joints of the limbs can be involved, in the thumb can be manifested as swelling, pain. 3. Thumb infection: Bacterial infection can cause onychomycosis or thumb dactylitis, which is characterized by elevated skin temperature, redness, swelling, oozing and fluctuating pain. 4. Local tumor: If local tumor occurs in the thumb area, it can cause pain in the thumb caused by compression on the tissues. No traumatic thumb pain, there may be other causes, it is recommended that patients go to the hospital in time, cooperate with the doctor for examination and standardized treatment.