Some swollen lymph nodes will go away on their own, depending on the cause. If the infection is bacterial or viral and is mild, it may go away on its own. Because the body has the resistance to destroy the bacteria or virus, the enlarged lymph nodes will gradually disappear. However, if the infection is more serious, it will not disappear on its own, and you need to go to the hospital as soon as possible to complete the relevant examinations, such as blood routine, C-reactive protein, ultrasound, etc., and give the appropriate medication for regular treatment. If it is caused by blood system diseases, such as lymphoma, it will not go away by itself, and the enlarged lymph nodes will become more and more, then chemotherapy or targeted drug therapy is needed. If it is caused by malignant tumor, the enlarged lymph nodes will not disappear, and need to be actively carried out radical resection of the tumor, coupled with other treatments, so the discovery of enlarged lymph nodes need to go to the hospital to clarify the cause of the disease.