The normal vagina is 2.5 cm in diameter and 8 cm in length. There are many "elastic fibers" on the vaginal wall to support the elasticity of the vagina, and countless "elastic fibers" are woven into a dense vaginal elastic fiber net, which nets the mucosa and many folds on the inner wall of the vagina, which can increase friction in sexual life and make both sides feel happy. With the increase of age, the causes of vaginal relaxation, such as pelvic floor ligament injury during pregnancy and childbirth, getting out of bed prematurely during lactation and puerperium, excessive physical labor, complicated medical diseases, chronic cough increasing abdominal pressure, and pelvic floor ligament loss of support after hysteromyomectomy, will all lead to vaginal relaxation. It is suggested that health care should be done during pregnancy and puerperium, and pelvic floor rehabilitation can also be done during puerperium, which is good for postpartum vagina. Because of getting married and having children, the vagina will become slack. After the elastic fiber of the vagina breaks, the vaginal opening will expand, and the vaginal wall will become brittle and thin, which will not only make it easier for germs to invade, but also make the vagina prone to organic damage during sexual intercourse. Due to the rupture and atrophy of pudendal elastic fiber network, the sensitivity of pudendal peripheral nerves decreases and becomes dull, leading to sexual apathy and pain during sexual intercourse. Rupture of elastic fibrous web in patients with vaginal relaxation is the main cause of vaginal relaxation. Women's vaginal wall is torn or often strenuous exercise. In the process of sexual intercourse, childbirth, frequent sexual life, abortion and drug abortion, the vaginal elastic fiber is pulled again and again, and the "vaginal elastic net" is broken, and the vagina cannot be retracted after being stretched, resulting in "vaginal relaxation".
2. People with diseases
(1) People with chronic diseases, weak constitution and emaciation have loose muscles, fascia and ligaments, which aggravate vaginal relaxation.
(2) With the increase of age, female estrogen decreases, which leads to the degeneration of muscles, fascia, ligaments and related supporting structures, the decrease of muscle tension, the thinning of fascia, the atrophy of vaginal mucosa and the aggravation of vaginal relaxation. The main tissues that maintain the elasticity and tightness of female vagina are the muscles and fascia of pelvic floor. Vaginal delivery will cause different degrees of damage to pelvic floor tissue. At the same time, with the increase of age, the ovarian function will gradually decline, and the amount of estrogen will decrease, which will degenerate the supporting structures such as fascia, decrease muscle tension and atrophy the mucosa, making the vagina more relaxed and inelastic. Over time, some women will have urethral or bladder bulging, leading to stress urinary incontinence (unable to hold back when sneezing or jumping)
Some patients with vaginal relaxation are slow to respond to stimulation or slow to reach orgasm in sexual life, which will lead to long-term sexual apathy, affect the quality of life of couples, and even lead to emotional breakdown. Vaginal relaxation will cause the vagina to be unable to "hold" the penis, lose sexual pleasure and orgasm, be frigid, blow into the vagina, dry the vagina, and the vaginal relaxation will cause bacterial toxin residues, cause vaginitis, cervicitis, and even infect gynecological diseases such as endometritis and adnexitis, which are difficult to cure.