Crohn's disease is a condition that causes parts of the intestine (bowel) to get red
and swollen. It can be challenging to deal with, but many teens find that they're
able to feel well and have few symptoms for long periods of time.
Who needs a flu shot? How long is mono contagious? This section has tons of articles
about infections that teens can get, with information about how they're spread, signs
and symptoms, when to go to the doctor, and more.