The Ministry of Health of China [-2007-] No. 227 states that the main scope of practice of pain medicine is the diagnosis and treatment of chronic pain. How do you understand “chronic pain” and what diseases are included? The term “chronic pain” is just a generic term for a certain stage of certain diseases, such as “herpes zoster”, which is generally considered to be acute within 1 month, subacute from 1 to 3 months, and chronic for more than 3 months, and is called “post-herpetic Neuralgia” is included in “chronic pain”. As we all know, “postherpetic neuralgia” is a kind of refractory neuropathic pain, does “herpes zoster” have to wait for 3 months to become refractory pain before it can be treated by the pain department? If early treatment with drugs and nerve block can reduce the incidence of “postherpetic neuralgia” and make patients suffer less, why not? Another example is that “trigeminal neuralgia” is divided into “primary” and “secondary”, and obviously “secondary” requires surgery, while “primary” requires surgery. If drug treatment is ineffective, the effect is not good or the patient is contraindicated to take drugs, minimally invasive interventional treatment should be used, and transcircular hole and oval hole perforation temperature-controlled radiofrequency thermal coagulation is considered to be the first choice for minimally invasive treatment of trigeminal neuralgia. Nowadays, imaging is very developed, and a CT or MR examination can assist in the diagnosis according to the medical history and physical signs. Long-term results are better than surgery. Once diagnosed, minimally invasive intervention should be considered first. It is not necessary to consider minimally invasive or surgical treatment only after 3 months of ineffective conservative treatment or when the condition worsens. I was a patient with lumbar disc herniation, and I know it firsthand. I could eat, drink, and move, and I was afraid of pain and helpless. Nowadays, there are many minimally invasive methods for the treatment of disc herniation, such as epidural block and drip, collagenase injection, radiofrequency and laser ablation, and intervertebral foramen technique, etc., which can be used according to different conditions. The above three diseases (herpes zoster, trigeminal neuralgia, and disc herniation) are currently assigned to each department from the textbook, but with the development of the times and the progress of science and technology, the pain department has better minimally invasive treatment methods, and these three diseases can be completely included in the treatment scope of the pain department, from outpatient and inpatient treatment to teaching and scientific research completely undertaken by the pain department or jointly with other departments. As the saying goes: don’t take on porcelain work without a diamond. What is the “diamond” of the pain department? I propose three words: safety is the premise, efficacy is the root, and minimally invasive is the advantage. Safety, efficacy and minimally invasive are the “diamond”, which is the root of the survival and development of the pain department. With this “diamond”, the pain department can take a lot of “porcelain work”, such as headache (especially neuropathic headache, cluster headache, cervicogenic headache), trigeminal neuralgia, disc herniation (including cervical, thoracic and lumbar disc herniation and its Herpes zoster and post-herpetic neuralgia, frozen shoulder, tennis elbow, tenosynovitis, osteoporosis with pathological fracture, cancer pain, perineal pain, sacral cyst, Raynaud’s disease, Buerger’s disease, red spot limb pain, hyperhidrosis, persistent eruption, insomnia, facial muscle spasm, facial nerve palsy, sudden deafness, tinnitus, etc., including painful and non-painful diseases. The Department of Pain Medicine can give full play to the concept of “pain” and “non-pain”, which are difficult to treat clinically. If the pain department can give full play to the advantages of “minimally invasive” and actively participate in the diagnosis and treatment of the above diseases, it is a great blessing for patients! Great fortune for society! The great fortune of medicine! After decades of efforts by several generations, the pain department will definitely stand on its own in the forest of medicine! A general hospital may not be complete without a pain department.