The first is vaginal or cervical inflammatory disease, because the hand has a wide range of activities, contact with a lot of things, especially easy to carry a variety of pathogenic bacteria, microorganisms, etc. and cause cross-infection, women masturbation will also damage the vaginal environment resulting in vaginal resistance is reduced. If you do not pay attention to hygiene when masturbating, it may lead to local infection of the vagina or cervix, and the patient may experience increased discharge, lower abdomen, lower back pain, etc. If the infection is not treated in time, it may cause an upstream infection leading to pelvic inflammatory disease. Secondly, patients with vulvar or vaginal injuries, if they do not pay attention to the strength of masturbation or do not cut their nails, it is very easy to cause nail scratches vulva, vagina or cervix and lead to abnormal bleeding.