Perineal pain may be caused by premature labor, coitus, vaginitis or prostatitis. 1. Early labor: Early labor may cause the pelvic floor sphincter to relax, which is usually accompanied by abdominal cramps and pain, as well as perineal pain. 2. Intercourse: because of the constant stimulation of the vaginal mucosa during intercourse, it can also cause pain and edema in the vulva and pubic area. 3. Vaginitis: when there is vaginal inflammation, the pH value of the vagina rises to about 7.1, and the invasion of pathogenic bacteria may cause edema of the vaginal mucosa, which may also cause swelling and pain in the perineum. 4. Prostatitis: for men, usually due to inflammation stimulation of the prostate, inducing glandular edema, hypertrophy, etc., reflecting to the perineum, resulting in perineal pain. If perineal pain occurs, it is recommended to consult a doctor in time to clarify the cause of the disease and carry out targeted treatment or therapy.