If you have formed a small pocket of fluid on some part of your body, you may have had a blister. These bubbles vary in size and have many causes.

HPV is a group of more than 200 related viruses, some of which are spread through vaginal, anal, or oral sex. Sexually transmitted HPV types fall into two groups, low risk and high risk

Testosterone is the main sex hormone found in men. It controls male physical features.. The testes (testicles) make testosterone.

How Estrogen and Progesterone levels affect women. These hormones play a key role in pregnancy and are also present in men.