If there is a hard lump at the shoulder and neck, the common causes are as follows: a. Injury to the shoulder and neck caused by accidental fall during strenuous activities can cause serious injury to the local soft tissues, accompanied by hematoma formation, which can cause a local hard lump, and the patient can have obvious pressure pain, restricted activity, and increased local skin temperature. local hematoma progressive absorption, so as to eliminate the local hard mass. Second, if the soft tissues of the shoulder and neck are accompanied by sarcoma hyperplasia, local hard lumps can also be formed. Since sarcoma is a malignant tumor, once it causes systemic spread, it can endanger the patient’s life. Therefore, it is recommended that the patient should undergo complete excision of the sarcoma as soon as possible. After surgery, local radiotherapy and systemic chemotherapy can be combined to kill the tumor cells in the body as much as possible to avoid serious complications that may endanger the patient’s life.