Redness of the pubic skin is usually caused by dilated capillaries or thinning of the skin in the perineum, which is related to genetic factors, exfoliating products, glucocorticoid drugs and other factors. 1. Genetic factors: some people are affected by genetic factors, born with capillary dilatation, manifested in the pubic skin with red blood, generally does not affect the health of the body, do not need special treatment. 2. Exfoliating products: If the pubic skin frequently uses exfoliating products, it will lead to thinning of the skin horny layer, and the capillaries under the skin will be obvious and appear red blood. It is recommended that patients avoid the use of irritating bathing products, avoid the use of rubbing towels and other repeated friction of local skin, so as not to lead to thinning of the skin, or even skin abrasion, triggering infection. 3. Glucocorticoid drugs: If the perineum long-term use of hydrocortisone, mometasone furoate and other glucocorticosteroids, will lead to local skin thinning, atrophy, capillary expansion, and the emergence of redness, which is an adverse reaction to the drug, it is recommended that the patient seek medical attention in a timely manner, and adjust the medication under the guidance of the doctor. The skin of the pubic area with red blood may also be caused by other factors, it is recommended that the patient seek medical attention in a timely manner, to clarify the cause of the symptomatic treatment.