There are many causes of swollen lymph nodes in the neck, so the time it takes for swollen lymph nodes to subside is related to the cause and varies from cause to cause. If the swollen lymph nodes in the neck are caused by inflammation, the lymph nodes will return to normal size after 7 days of anti-inflammatory treatment. If the swollen lymph nodes in the neck are due to lymphoma, the patient will need chemotherapy, and each patient has a different sensitivity to chemotherapy drugs, so the time to recede varies from person to person. If the swollen lymph nodes are caused by tuberculosis, the swollen lymph nodes will subside after 6 months of anti-tuberculosis treatment in some patients. If the swollen lymph nodes are caused by the metastasis of the tumor in the neck, the time to recede is related to the patient’s sensitivity to the treatment regimen and the degree of deterioration of the disease. Therefore, when patients find swollen lymph nodes in the neck, it is recommended to promptly visit the general surgery department or head and neck surgery department to identify the cause of the disease and treat it according to the cause.