A positive IgM for herpes simplex virus type 2 indicates that the body is infected with herpes simplex virus type 2, which causes genital herpes and is contagious. Genital herpes is mainly caused by herpes simplex virus type 2 infection, and is most common in the genital area and perineum, including the glans, prepuce, and coronal region in men, and the labia majora, labia minora, clitoris, and uterus in women, and in a few cases, in the groin and around the anus. Genital herpes manifests as small blisters on the skin, which may later form ulcers, accompanied by pain and swollen lymph nodes in the groin, and may also be accompanied by symptoms such as fatigue, limb pain, headache and so on. Infected with genital herpes should go to the hospital in time for examination and treatment as prescribed by the doctor.