A bulge in the wrist may be related to lipoma, sebaceous cyst, tendon sheath cyst, trauma and other causes. 1. Lipoma: If normal fat-like tissue appears between the subcutaneous and muscular areas of the wrist, it can cause a localized bulge. 2. Sebaceous cysts: If the sebum secreted by the sebaceous glands at the wrist cannot be normally discharged from the follicular opening and accumulates in the glands, cysts can be formed, giving rise to a bulge at the wrist. 3. Tendon sheath cysts: chronic strain at the wrist and other causes can cause an increase in synovial fluid secretion in the tendon sheath, appearing as a lump on the surface of the body. 4. Trauma: External injuries such as falls can cause dislocation or fracture of the wrist joints, which can be manifested as a bulge in the wrist. It is recommended to go to the hospital in time to clarify the cause of the wrist bulge, under the guidance of the doctor for standardized treatment.