Hidden pain in the left side of the neck has many causes, different causes, different departments, you can usually hang orthopedics, general surgery, oncology, cardiology or chest pain center. 1. Orthopedics: Hidden pain in the neck may be caused by neck trauma, cervical spondylosis, fasciitis, etc., which can be referred to orthopedics. 2. General Surgery: such as lymphadenitis, neck soft tissue infection, etc., which can be consulted in General Surgery. 3. Oncology: such as thyroid tumor, lymph node metastatic cancer, malignant lymphoma, etc., these need to hang up oncology consultation. 4. Cardiology or chest pain center: if the patient’s left neck pain is accompanied by chest pain, it may also be due to the neck pain caused by coronary artery disease, and the patient can consult cardiology or chest pain center. Caused by the left side of the neck pain is very much cause, specific hang what department, you can go to the hospital to consult the pre-screening triage staff, by the medical staff according to the medical history, symptoms and other judgments, and then choose the appropriate department for consultation.