What diseases are seen in pain medicine? Pain has been ranked by modern medicine as the fifth most important vital sign after respiration, pulse, blood pressure and body temperature. Some chronic pain is also a disease in itself (e.g. trigeminal neuralgia, post-herpetic neuralgia, etc.). The Ministry of Health document 227 of 2007 stipulates that pain departments can be established in hospitals above the second level, and the main scope of practice of pain departments is the diagnosis and treatment of chronic pain diseases. Chronic pain mainly refers to pain that lasts more than one month or recurring. The scope of business of the pain department mainly includes the following aspects: 1. chronic pain in muscles and soft tissues This type of pain includes myofasciitis, tenosynovitis, frozen shoulder and chronic lumbar muscle strain. 2, bone and joint pain Various causes of knee arthritis, shoulder arthritis; ankylosing spondylitis, sacroiliac arthritis, etc. 3, headache Headache is a common chronic pain disorder. 4, neuropathic pain A chronic pain caused by neurological injury, such as: trigeminal neuralgia, postherpetic neuralgia, diabetic peripheral neuralgia, central pain, etc. 5, spinal origin pain Pain caused by spinal-related structural lesions. Such as lumbar disc herniation, cervical spondylosis, spinal arthropathy, etc. 6, pain caused by metabolic diseases such as osteoporosis pain, vertebral compression fractures, etc. 7, chronic pain after trauma such as post-surgical incision pain. 8, certain non-painful diseases such as facial nerve dysfunction, facial muscle spasm, obstinate disobedience, indeterminate statement syndrome, etc. 9, vascular pain such as arteriosclerosis occlusion, erythema extremities pain, Raynaud’s disease, etc. 10.Cancer pain Late stage cancer pain contains a variety of pathogenic factors triggering pain.