The medical community defines pain that lasts more than one month as “chronic pain”, which is a disease with a prevalence of 30%. It is important to see a specialist in time to relieve pain. It is often believed that pain is a symptom of a disease, not a disease, and that it will stop when the disease is cured. At the 9th International Congress of Pain Medicine held in Vienna in 1999, experts at the meeting clearly pointed out that pain is not only a symptom, but in many cases pain itself is a disease. That is, acute pain is a symptom and chronic pain is a disease. For example, trigeminal neuralgia and post-herpetic neuralgia, etc. If the pain is cured, the disease will be cured. Pain has been listed by modern medicine as the fifth vital sign after respiration, pulse, blood pressure and body temperature. So, which pains should go to a pain specialist? 1, the cause and section attributed to the pain is still unclear such as chronic general pain, headache, chest and back pain, abdominal pain, spinal extremity pain, etc., although after a number of hospitals, multiple departments, a long time counter-matching reasons, do not know which section they should go to on the review of careful examination, but also did not find out with the pain of the matching diagnosis, then you should see the pain department. After careful examination by pain doctors, including diagnostic treatment, most of the pain can find the cause, take the right treatment, can get satisfactory results. For example, herpes zoster is a dermatological disease, and the dermatology department has rich experience in treating herpes and good results in the early stage. Most patients with shingles have pain that disappears naturally as the herpes improves, but a significant number of patients have pain that not only does not improve after the herpes disappears, but becomes more painful, medically known as “postherpetic neuralgia”. This is a very persistent painful disease, there is no special treatment in other departments, if you can go to the pain department early treatment, often can achieve satisfactory results. Such as the residual limb pain after amputation, chronic intractable postoperative pain syndrome after various surgical procedures, etc., the nature and extent of pain has long exceeded the scope of treatment of the original department, these pains need to be treated in the pain department. 3. Neck, shoulder, lumbar and leg pain without surgical indications Certain patients with cervical spondylosis, spinal stenosis, lumbar disc herniation without surgical indications and patients with frozen shoulder, osteoarthritis, myofascial syndrome and osteoporosis who usually do not need surgery have persistent chronic pain and are suitable for treatment in the pain department. In addition, some painful diseases, despite the indications for surgery, patients are unwilling to undergo surgery, or the postoperative efficacy is not significant, or the pain recurs after surgery, etc., should also receive comprehensive pain specialist treatment. 4, vascular, ductal spasm embolism caused by pain such as Raynaud’s disease, angina pectoris, bile duct stones, ureteral stones, etc. caused by severe pain, pain department treatment can effectively relieve pain, and sometimes can play a synergistic role in the treatment of disease. 5, neurogenic pain According to the definition of the International Academy of Pain (abbreviated as “IASP”), neurogenic pain refers to pain caused by primary lesions or dysfunction of the nervous system, such as central pain, reflex sympathetic dystrophy, burning neuralgia, trigeminal neuralgia, glossopharyngeal neuralgia, occipital neuralgia, intercostal neuralgia, diabetic peripheral neuritis, etc. Neurogenic pain is a large category of very complex painful diseases, and conventional treatment is basically ineffective, often requiring special specialized techniques in pain departments, such as minimally invasive neurointerventional analgesia, spinal cord electrical stimulation, and central target-controlled analgesia techniques. Therefore, patients with this type of disease should also visit the pain department. 6, certain chronic non septic arthritis caused by pain such as rheumatoid arthritis, ankylosing spondylitis, gout, etc.. The pain department can take individualized analgesic programs for different diseases, which can minimize the pain of patients and provide strong support for the treatment of the primary disease. 7.Cancer pain Pain that still exists while or after completing anti-cancer treatment can be treated with special analgesic measures in the pain department – in addition to morphine-based drugs, minimally invasive neurointervention techniques such as nerve block and nerve destruction can also be adopted. Modern medical research shows that cancer and cancer pain are two separate diseases closely related to each other, and the degree of cancer pain is usually not proportional to the development of cancer. Perfect pain treatment can not only improve the quality of life and survival of cancer patients, but also prolong their lives to a certain extent.