Most women bleed when they have sex for the first time, but there are some women who do not bleed, such as when the hymen has been broken during strenuous exercise or when the hymen is congenitally missing. Women who have sex for the first time usually bleed, the main reason is that bleeding is caused by the rupture of the hymen ring, the amount of bleeding will vary according to the shape of the hymen ring, elasticity and other individual differences. The amount of bleeding may vary depending on the shape and elasticity of the hymenal ring. It may also be related to the tearing of the vaginal wall, which is most common in women with gynecological infections, or women who are too rough during sex, or women who have abnormalities of the reproductive organs. However, there are some women who will not bleed during the first intercourse, because the hymen ruptures during strenuous exercise, and a small amount of blood is not noticed, or congenital hymen deficiency. There will be a small amount of bleeding during the first intercourse, but most of them can stop on their own and do not need special treatment. If the bleeding is too much, please consult a doctor in time, do not treat yourself, so as not to delay the condition.