Auntie Towel stands for sanitary napkin, sanitary napkin will expire, most of the sanitary napkin has a shelf life of three years, so make sure to use it before the expiration date of the sanitary napkin. If the sanitary napkin exceeds the expiration date is not allowed to use, so as to avoid the occurrence of vulvovaginal infections, resulting in vulvar itching, redness, swelling, increased secretion and so on. You can choose different types of sanitary napkins according to the amount of menstrual flow, usually on the second to third day of menstruation when the amount of menstrual flow is the most, you can choose thicker and longer sanitary napkins, it is recommended to change them once every three hours or so so as to avoid prolonged non-changing and breeding of bacteria that can lead to vulvovaginal or vaginal infections. It is recommended to buy the regular brand of sanitary napkins, and should be used within the expiration date, for the opened sanitary napkins need to be placed in a dry location, avoid placing too long, if the moisture moldy sanitary napkins must not be used. If the use of expired sanitary napkins occur adverse reactions, the symptoms can not be relieved, you need to go to the hospital in a timely manner.