Bags on the back of the neck are clinically common in the following three cases: First, the most common are mainly seen on the body surface and are commonly benign tumors, such as lipomas. Generally speaking, lipomas have almost no possibility of malignant disease clinically, and can be cured by complete removal through local anesthesia surgery. Secondly, sebaceous cysts are mainly seen in the sebaceous glands. Generally, if there is no infection in the sebaceous cysts, they can be cured by complete excision with local anesthesia. If an infection or abscess is present, it usually requires an incision to drain the pus and a complete excision in the second stage of surgery to obtain a cure. Thirdly, canker sores, which are mainly polypoidal folliculitis, usually require a “well” incision and adequate drainage to be cured.