Diffuse idiopathic bone hypertrophy mainly involves the spine and cervical vertebrae. Common clinical features include stiffness of the neck and spine, pain, abnormal movement, hoarseness or dysphagia. 1. Stiffness: stiffness of the neck and spine is the most common clinical feature of diffuse idiopathic bone hypertrophy, and the stiffness is obvious in the morning and evening. 2. Pain: Neck and spine pain is also one of the characteristics of diffuse idiopathic bone hypertrophy. The pain may involve the back, and bone and ligament ossification can be seen on X-ray. 3. Motor abnormalities: Diffuse idiopathic bone hypertrophy causes compression of the spinal cord or nerve roots after the formation of bone fragments, resulting in motor abnormalities. 4. Hoarseness or dysphagia: The compression of the esophagus or the recurrent laryngeal nerve by the formation of the osteophyte may lead to hoarseness or dysphagia. If the patient has the above clinical features, it is necessary to go to the local hospital as soon as possible for a clear diagnosis and early treatment.