Lymph node enlargement in AIDS is a persistent, widespread lymph node enlargement that is not confined to a particular area. Therefore, if the lymph node enlargement is due to AIDS, it should be present in at least two other areas of the body besides the groin. The diameter of such enlarged lymph nodes is usually greater than 1 cm, there is no pressure pain, and there is no adhesion with the surrounding tissues, that is, it is movable when pushed. The difference between this kind of lymph node enlargement and ordinary lymph node enlargement is that ordinary lymph node enlargement, such as submandibular lymph node enlargement, may be accompanied by inflammation of the throat or some surrounding infections, but AIDS lymph node enlargement is not accompanied by inflammation or infection of the surrounding tissues.