Bunion pain may be caused by contusion, tendonitis, gouty arthritis, bunion, gouty nail, etc. 1. Contusion: If you walk for a long period of time, your shoes are squeezing your big toe, resulting in a contusion of the tissues surrounding the bunion, you may experience a painful big toe. 2. Tendonitis: Sprains or chronic injuries to the big toe may occur due to long-distance running, exposure to cold, or exertion, inducing aseptic inflammation of the tendonitis and soft tissues, and resulting in big toe pain. 3. Gouty arthritis: big toe pain may be caused by gouty arthritis. If uric acid is deposited in the big toe, it is one of the most common areas of gouty arthritis, causing pain, redness, swelling and functional limitations. 4. Bunion: due to prolonged bunion, it may cause subluxation of the big toe joint or bunionitis, leading to symptoms of big toe pain. 5. Inguinitis: Bunion pain can occur when the toenail stings the big toe or when the skin tissue is damaged and infected with germs, resulting in an infection called inguinitis. There may be other reasons for bunion pain, so it is recommended to go to the hospital in time, complete the examination to clarify the cause of the problem, and then give targeted treatment or therapy under the guidance of the doctor.