Bone bumps in the wrist may be normal anatomical structures, or they may be caused by diseases such as osteophytes, tendon sheath cysts, tenosynovitis, fractures or dislocations. 1. Normal anatomical structure: the bulge at the wrist near the thumb side is called radial tuberosity, and the bulge near the little finger is called ulnar tuberosity, which are both normal anatomical structures of the human body and usually have no discomfort. 2. Pathological factors (1) Osteomalacia: it occurs in the proximal interphalangeal joints and carpometacarpal joints, and when it occurs in the wrist, it can cause bone protrusion, and at the same time, it can be accompanied by symptoms of limited joint movement, pain, stiffness, deformity, and muscle atrophy. (2) Tendon sheath cyst: It is mainly related to overstrain of wrist joints, and the joint fluid expands to form a cyst through the weak point of wrist joints, which makes the wrist appear to have a small bone protrusion, and it may be asymptomatic or accompanied by local pain and numbness and other symptoms. (3) Tenosynovitis: Inflammatory foci of tenosynovitis can be gradually deposited to cause local bone and fiber proliferation and calcification, which will cause small bone bumps at the wrist, and may be accompanied by local pain, redness and swelling. (4) Fracture or dislocation: When the wrist is fractured or dislocated as a result of trauma, the above symptoms may also occur, usually accompanied by pain, swelling, and restriction of movement. If there are obvious pain and other uncomfortable symptoms, it is recommended to consult a doctor in time, improve the X-ray and other examinations to clarify the cause of the disease, and then actively treat it, so as to avoid delaying the condition.