After menstruation, women can still have sex. Sex is not only an important bond between husband and wife, but it is also good for the body. However, after menopause, women’s reproductive organs are in a state of atrophy due to changes in hormone levels. With the prolongation of menopause, this atrophy will become more obvious, which is reflected in the atrophy of the vulva, the thinning of the vaginal wall and the decrease of the dominant bacterium (Lactobacillus) in the vagina, thus the vagina’s self-cleaning ability will be reduced. Therefore, when having sex at this time, it is important to pay more attention to hygiene to prevent retrograde infection. After menopause, due to the decrease of vaginal self-cleaning ability and the invasion of exogenous pathogens, it is easy to get atrophic vaginitis. The common symptoms are increased vaginal discharge, yellow color, odor, and vulvar itching. If any of these conditions occur, it is important to seek prompt medical attention.