If you notice some bleeding during sex, particularly if you’re having rough sex or not using lube, you may have scraped your vagina. This can happen during penis-in-vagina sex, during fingering , and even during masturbation. "Most of the time, these scratches or cuts are very small and heal on their own within a few days. Very rarely, a scratch or cut inside of the vagina may need medical attention to help it heal and reduce the risk of an infection," June Gupta, MSN, WHNP-BC, associate director of medical standards at Planned Parenthood Federation of America , previously told Refinery29. To reduce the likelihood of this happening, next time, add lube