any inflammation of the vagina. Atrophic vaginitis is an inflammation of the vagina in which vaginal tissue becomes thin and dry. This condition often occurs after menopause and is caused by lack of estrogen. It may be relieved by an estrogen cream, ring, or tablet that is placed in the vagina. Some types of vaginitis can also be side effects of chemotherapy. See also,chemotherapy, estrogen, menopause, vagina.