A red swelling on the left side of a bulge one centimeter deep in the vagina is a cyst of the vaginal wall or a cyst of the vestibular gland. Vaginal wall cysts: Normal vaginal walls are smooth and elastic, with no redness. When the vagina inflammation when the formation of cysts, bulging protruding from the vaginal wall, the occurrence of redness is usually combined with infection, the formation of abscesses. Treatment with antibiotics, local fumigation sitz bath, if the effect is not obvious line surgery. Vestibular gland cyst: it is caused by the blockage of the vestibular gland ducts, and when a cyst is formed, the bulge protrudes, and the redness and swelling are combined with infection to form an abscess. Cysts can be treated with antibiotics and local fumigation sitz baths, abscesses must be treated surgically, the operation can be performed cyst removal or abscess stoma. Vaginal wall cysts or vestibular cysts once found, must be timely medical treatment, standardized treatment, so as not to delay the condition.