Women who give birth naturally through the vagina will expand the folds of the vaginal wall and relax the vagina when the fetus passes through the birth canal, which is a physiological phenomenon of women who have given birth through the vagina. Most of them will gradually return to normal after 42 days after delivery, and the elasticity of vagina will also return to the state before delivery. If after 42 days, the vaginal elasticity can not be restored to the state before delivery, it is necessary to consider the possibility of pelvic floor muscle relaxation. In this case, the parturient can exercise the pelvic floor muscles by lifting the anus to promote the recovery of vaginal elasticity. You can also go to the postpartum pelvic floor rehabilitation center in a regular hospital for evaluation and treatment, and promote the recovery of pelvic floor muscles through electrical stimulation and biofeedback.