The pain on the upper side of the big toe may be caused by trauma, gingivitis, gout and other reasons. 1. Trauma: If you have pain on the side of your big toe, you should first check whether you have suffered any trauma. Trauma can easily lead to local soft tissue injury, joint dislocation, fracture and so on, which will cause pain on the big toe. 2. Inguinitis: Inguinitis is a condition in which the nail grows into the nail groove, causing inflammation of the nail groove for a long time and leading to inflammatory reactions in the skin around the nail. For example, the toe is swollen and painful to press, and other symptoms. 3. Gout: Gout is caused by the accumulation of uric acid in the body, resulting in abnormal uric acid metabolism. If it is deposited into the soft tissue area of the joints of the big toe, the phenomenon of pain in the big toe area will occur. The pain on the upper side of the big toe may also be caused by factors such as dactylitis, playful skin, etc. Patients should consult a doctor in time for a clear diagnosis and targeted treatment.