After sitting in the pain clinic for a long time, we often encounter many patients who are suffering from chronic pain diseases, often spending a lot of time and money on X-rays, ultrasound, CT, MRI and even PET-CT examinations, but still cannot find the cause of the disease. In clinical practice, some diseases are diagnosed by experience and clinical symptoms, and these diseases also plague our clinicians. Infrared thermography provides objective information to our pain physicians and patients. Medical infrared imaging is a method of diagnosing disease and studying the functional status of the human body by converting infrared radiation of different intensities from different parts of the body into temperature. Infrared thermography can be used to diagnose certain diseases that cannot be examined by X-ray, ultrasound, CT or MRI, and save valuable time for early treatment. The scope of medical infrared thermography examination: 1.Census of healthy people – the initial screening of diseases – early detection of subhealth state. 2.Early diagnosis of tumor – breast cancer, skin cancer, thyroid cancer, stomach cancer, liver cancer, pancreatic cancer, etc. 3.Diagnosis of early disorders of blood circulation – insufficient blood supply to the heart muscle, varicose veins, lumbar disc herniation, cervical spondylosis, ischemic necrosis of the femoral head. 4.Diagnosis of inflammatory diseases-tenosynovitis, ankylosing spondylitis, gastroenteritis, prostatitis, pancreatitis, appendicitis. 5.Diagnosis of painful diseases-headache, neuralgia, neck, shoulder, back and leg pain, joint pain. 6.Diagnosis of peripheral nerve diseases – facial paralysis, facial muscle spasm, plant nerve dysfunction.