The patient’s left side of the neck with hard lumps, the common causes are mainly the following: First, the left side of the neck skin with sebaceous cysts and infection, can form a larger volume of inflammatory masses. At this time, the patient can be localized external application of Ruyi Jinhuang paste or vitality iodine gauze, oral amoxicillin to promote the absorption of local inflammatory masses, subside. After the local inflammation is completely absorbed, it is recommended that patients have sebaceous cysts surgically removed as soon as possible to avoid recurrent episodes of local inflammation. Second, the patient due to nasopharyngeal malignant tumor, can cause the left side of the neck lymph node metastasis, in the local formation of hard mass, can be perfected through the nasopharyngeal enhancement CT examination, clear lesion specifics. The malignant tumor needs to be removed as soon as possible and the lymph nodes in the neck need to be cleared, after the surgery needs to be combined with chemotherapy, radiotherapy, most patients can achieve certain therapeutic effects.