Lymph nodes are usually found in all tissues and organs of the body, with the main sites on the surface of the body being the groin, neck, armpits, and under the collarbone. Lymph nodes are an important part of the body’s immune system and help fight bacteria, foreign viruses and other pathogenic microorganisms. In general, lymph nodes are found on all parts of the body, but they are more densely distributed in the groin, abdomen, neck, armpits, and under the collarbone. Patients with enlarged lymph nodes are usually considered to have local inflammation, but the possibility of neoplastic diseases cannot be ruled out. Therefore, it is recommended that patients with enlarged lymph nodes should go to the hospital in time for relevant examinations to clarify the cause of the disease, and under the guidance of the doctor, treatment should be carried out according to the actual situation.