Bunion pain may be caused by injury, gout, rheumatoid arthritis and other factors. 1. Injury: Bunion pain may be caused by long term walking, poorly fitted shoes and other causes of bunion injury. 2. Gout: a heterogeneous group of diseases caused by increased uric acid concentration in the blood due to impaired purine metabolism in the body, excessive production of uric acid or decreased excretion of uric acid. When the patient acute attack, thus can appear the phenomenon of thumb pain. 3. Rheumatoid arthritis: its occurrence is closely related to a group of streptococcal infection, the specific pathogenesis has not been fully clarified. However, it can be induced by cold and wet weather. Due to the stimulation of inflammation, the phenomenon of bunion pain can occur. Bunion pain can also be seen in other diseases, such as bunion, inguinitis, etc. It is recommended to go to the hospital in a timely manner, and follow the doctor’s instructions for treatment, to avoid delaying the condition.