Some people may not have a hymen due to individual differences, which is normal and not a cause for concern. There are many forms of hymen, such as ring-shaped, serrated, umbrella-shaped, curved-moon, double-perforated, sieve-shaped, atretic or absent hymen, depending on individual development and the level of hormones secreted by the body. The role of the hymen is to defend the vagina against the invasion of bacteria and other pathogenic microorganisms, and also to prevent urine from entering the vagina. It is recommended to pay attention to personal hygiene, wash the vulva regularly, change underwear regularly, wear cotton, loose, breathable underwear, eat a light diet, eat more fruits and vegetables, and exercise properly to enhance resistance.