The first time you insert your finger into the vagina during sex, you will not necessarily have bleeding, you need to analyze the specific situation. There are the following reasons for bleeding: 1, hymen rupture: the hymen is located around the vaginal opening, which can be easily touched by fingers. Inserting fingers into the vagina is likely to cause hymen rupture and bleeding, accompanied by pain; 2, damage to vaginal mucosa: fingers are more flexible, if they are not trimmed nails, or stronger, they are likely to scratch the vaginal wall, resulting in a small amount of bleeding; 3, near the menstrual period: if it is about to menstruation period, stimulated by sexual excitement, the menstruation comes early or on time, and it will also show bleeding, in this case there is not too obvious pain at the vaginal opening. There is no bleeding for the following reasons: 1. The hymen has been ruptured: even if you have not had sex in the past, the hymen may have been ruptured due to the usual strenuous exercise, external impact, etc., so it will not bleed when you insert your finger for the first time; 2. No hymen rupture is caused: the hymen is a layer of crepe film tissue with a hole in the middle located around the vaginal opening and is elastic, so the finger can pass through the middle It will not cause the hymen to rupture, so it will not bleed naturally.