Kissing is one of the most direct ways of expressing love between a husband and wife, a man and a woman. Kissing can be done at any stage and has no relation to menstruation and certainly no benefit, so kissing in normal life does not affect menstruation. During menstruation the main thing can be kissing, can have hugs, can have physical touch and contact, but can not have intercourse, because during menstruation the mouth of the uterus is open, menstrual blood contains a large number of bacteria, at this time if you do not control their sexual life, it is easy to cause women to have menstrual blood reflux caused by pelvic infection and endometriosis, which is not good for the body. In addition, men’s genitals can also be at risk of infection when they come into contact with menstrual blood, so avoid having sex during menstruation.