Do you know where the hymen is?

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　　The hymen is located at the boundary between the vaginal opening and the vaginal vestibule. It is a film-like tissue that surrounds the vaginal opening with a hole in the middle and is not completely closed. There is a hole or holes in the middle called the hymenal pore. Most of the holes are ring-shaped, oval, half-moon or irregular cracks ； Porous and sieve-like. The hymen is covering female A hollow membrane at the external vaginal opening, about 1 to 2 mm thick. Both sides of the membrane are moist mucous membranes. The two layers of mucous membranes contain connective tissue, capillaries and nerve At the end, the small hole in the middle is called the hymen hole. The size of the hymen pores and the thickness of the membrane may vary from person to person.

　　The hymen prevents external unclean things from entering the vagina and protects the vagina. Before puberty, because the ovaries secrete very little estrogen, the vaginal mucosa is thin, has few wrinkles, and has low acidity, so the resistance is poor. The hymen has a protective effect in blocking bacteria from invading the vagina. ； After puberty, with the development of the ovaries, estrogen in the body increases, vaginal resistance strengthens, and the hymen gradually loses its role. After a woman matures, monthly menstrual blood is discharged from the body through this small hole. If there is no small hole in the membrane, the monthly menstrual blood will be blocked by it and cannot be discharged from the body. Medically, it is called hymenal atresia. If not discovered in time, menstrual blood accumulates in the vagina and can expand upward over time. Uterus The lumen and fallopian tube flow into the abdominal cavity through the distal opening of the fallopian tube, causing damage to the fallopian tube, intestinal adhesion, and abdominal infection.