The causes of vaginal dampness vary according to the time period. 1. Normal mature women have liquid vaginal secretions or leucorrhoea due to estrogen secretion from the ovaries, which makes the vagina appear damp and is a normal physiological phenomenon and has a protective effect on the vaginal environment. The vaginal secretion is normal and has a protective effect on the vaginal environment. It usually changes with the menstrual cycle, but after menstruation the secretion is less and during ovulation the secretion increases significantly, so the vaginal dampness is more obvious. 2. The reason is that during pregnancy, the secretion of estrogen and progesterone in the body of pregnant women increases significantly, causing a significant increase in cervical and vaginal secretions. 3, if a woman suffers from cervicitis, adnexitis, pelvic inflammatory disease or vaginitis, it is also easy to cause increased leucorrhea, which is pathological.