Reactive lymph node enlargement in the neck is a benign lesion that usually leads to enlargement of the surrounding lymph nodes in the presence of inflammation in the neck, sometimes accompanied by pain. For example, gingivitis, when there is inflammation inside the mouth, can lead to enlarged lymph nodes in the jaw and neck, which need to be treated with oral antibiotics. After the primary lesion is controlled, the swollen lymph nodes in the neck can all return to normal. Commonly used antibiotics include cefixime, cefradine, and levofloxacin hydrochloride, etc. The treatment cycle is usually about one week. If there is inflammation of the thyroid gland in the neck, such as subacute thyroiditis or Hashimoto’s thyroiditis, it may also lead to swollen lymph nodes in the neck, which need to be treated with oral thyroxine tablets and, if necessary, hormones.