The absence of folds in the vagina is associated with young age, underdeveloped ovarian function, and vaginal laxity. The vagina is a cavity organ that connects the female internal and external reproductive organs that are wide at the top and narrow at the bottom, and is the main organ for menstrual flow, late foetal emergence and sexual intercourse. The normal vaginal wall has many transverse rows of cleavage folds to maintain the stretch and elasticity of the vagina as well as sexual pleasure, etc. The vagina has no folds. The absence of folds in the vagina does not usually affect normal physical health and may be related to the following factors: 1. Too young, imperfect ovarian function: due to the age of too small, has not entered the puberty development period, the ovarian function does not secrete a certain amount of estrogen and progesterone to promote the development of the reproductive organs, there is no folds in the vagina, which belongs to the normal physiological process, after puberty, the reproductive organs are gradually developing, the vagina will appear folds. 2. Vaginal wall relaxation: with multiple vaginal deliveries, the vaginal wall loses its original elasticity and extension, resulting in the disappearance of vaginal folds, which is usually difficult to return to its original state. If vaginal itching, increased secretions or other uncomfortable symptoms occur, you need to go to the hospital in time to see a doctor and follow the doctor’s instructions to deal with the treatment.