Vaginal dryness is most commonly caused by a drop in the level of estrogen produced by the body, typically during menopause or as a result of breastfeeding, childbirth, douching too often, or the presence of some medical conditions like polycystic ovary syndrome. Long-term use of some medical treatments including chemotherapy for cancer can also cause vaginal dryness, and so can surgical procedures like total hysterectomy and oophorectomy, or removal of the ovaries. Any of these issues can cause the vaginal tissues to produce less natural lubrication, and they may also cause the vagina to become less elastic.