The whole leg pain usually can choose to hang general surgery, orthopedics, rheumatology and vascular surgery and other departments for examination. 1. General Surgery: Patients with left leg pain can first go to the hospital and register with the General Surgery Department for a preliminary diagnosis, after which they can be transferred to a specific department for treatment according to their specific condition. 2. Orthopedics: left leg pain can also be registered orthopedics for related treatment, the causes may include muscle strain, osteoarthritis, local bone tumors, etc., but also may be the lumbar intervertebral disc herniation caused by nerve compression caused by leg pain. 3. Rheumatology and Immunology: If the whole left leg hurts and is accompanied by joint deformation, morning stiffness, fatigue and other symptoms of general discomfort, it may be rheumatoid arthritis. It may be a manifestation of rheumatoid arthritis, and you need to go to a regular hospital and register with the Department of Rheumatology and Immunology for consultation and treatment. 4. Vascular Surgery: If it is the problem of varicose veins or the swelling of legs caused by blood clots, this kind of general vascular surgery can be registered. If you have pain in the whole left leg without excessive exercise or labor recently, it is recommended to go to the regular hospital in time and follow the doctor’s instructions for treatment.