Two things should be done when swollen lymph nodes in the neck are found: first, find the cause of the swollen lymph nodes in the neck; second, provide specific treatment according to the specific cause. There are many causes of swollen lymph nodes in the neck, and they can be divided into two categories: benign diseases and malignant diseases. Benign diseases are mainly a variety of infections, including systemic infections, such as cytomegalovirus infection and EBV infection. They also include localized infections, such as oral infections and infections of the head and face, which are treated with anti-infection therapy. The most common malignant disease that needs to be investigated is lymphoma, and if lymphoma does exist, the corresponding chemotherapy should be administered in a timely manner so as to solve the problem of swollen lymph nodes in the neck.