Tampon And Swimming Dear Iris, I'm 14 years old and can't use tampons. This wouldn't be so bad, but next year I have to take swimming for school. I've tried to use a tampon but I can't. What can I use instead and still be able to swim? Thanks. Marissa --- Dear Marissa, You cannot swim when you are menstruating unless you use a tampon. Otherwise you risk menstrual fluid in the pool. You need to reconsider tampons if you plan to swim while on your period. http://www.beinggirl.com/article/how-to-use-a-tampon is a page that will help you with insertion. After reviewing this if you are doing it all right and cannot insert a tampon, it may be that your hymen, the thin membrane that partially covers and protects the opening to your vagina may be too small or too tight to allow the tampon in. If this is the problem you may have to stretch this opening. You can try with a little bit of K-Y Jelly on the tip of the applicator...the more you practice the more you will stretch the hymen. If you cannot stretch it yourself, you may want to ask mom to make an appointment with your doctor/healthcare professional for help. Hope this is helpful, Your BeingGirl Experts Questions about tampon and swimming? Get answers, tips, and advice at BeingGirl.com.