Bone metaplasia is also known as osteophyte, the symptoms are mainly manifested as pain, swelling, activity limitation, etc. Special symptoms may occur in special parts of the bone metaplasia. 1. Common symptoms: Bone metaplasia is formed when cartilage tissue is damaged and the cartilage membrane proliferates to produce new bone through ossification. Most of the bone growths usually do not cause symptoms. Symptoms appear due to the bone redundant card pressure around the soft tissue caused by, such as the knee joint bone redundant, most of the manifestations of the knee joint pain, edema, joint inflexibility and other manifestations; superficial parts of the bone redundant, but also can be manifested as a subcutaneous knot or local deformity, such as fingers, toes and other parts of the body. 2. Special symptoms: special parts of the bone may show atypical symptoms, such as lumbar degenerative disease caused by the bone, compression of the nerve, may be manifested as lumbar pain, lumbar stiffness, sciatica, numbness of the lower limbs, weakness and other manifestations. In cervical vertebrae, the bone remnants may show numbness, weakness and cotton feeling in both upper limbs; in esophageal cervical spondylosis, the bone remnants may also show foreign body sensation in the pharynx and difficulty in swallowing. In order to detect the bone swelling in time, it is recommended to have regular medical checkups, and to have regular treatment as soon as possible after the discovery of the bone swelling.