The common causes and treatment measures of swollen lymph nodes in the neck are as follows: 1. Inflammation of lymph nodes in the neck: the primary lesion needs to be treated with purging and anti-inflammatory treatment; 2. Tuberculosis of lymph nodes in the neck: the whole body or the neck needs to be treated with standardized anti-tuberculosis treatment; 3. Metastatic cancer in the neck: except for tumors with low pathological differentiation such as nasopharyngeal carcinoma, it is recommended that the primary lesion be enlarged and combined with lymph node dissection in the neck; 4. Malignant lymphoma: radiotherapy, chemotherapy or combined treatment is required.