The chancre is a symptom of stage 1 syphilis and is found in the coronal groove of the penis, the glans, the perineum, and the prepuce ligament in men, and in the labia minora, labial ligament, cervix, and perineum in women.
Syphilis is a chronic infectious disease caused by syphilis spirochete infection, mainly through mother-to-child transmission, sexual transmission, blood transmission. Stage 1 syphilis is mainly characterized by a hard chancre of the genitals and enlarged lymph nodes in the groin, and usually has no other symptoms. It occurs mainly on the skin of the external genitalia and perineum.
The noma begins as a small red spot, then develops into a painless inflammatory papule, which gradually expands to form a vesicle, with necrosis on the skin surface, forming an ulcer, and a subcutaneous nodule that is as hard as cartilage.
The chancre should be examined and treated in a hospital as soon as possible to avoid delaying the condition.