Aug 3, - Yeast infections and bacterial vaginosis are infections that can be easily treated for a more comfortable sexual experience. Also, fibroids, pelvic inflammatory disease, endometriosis, and sex too soon after childbirth can all be causes. The easiest fix to treat painful sex is the use of a lubricant. Feb 20, - 1 in 13 women feel pain during sex, according to a recent British study. Here's what you can do to make the experience better for her.