Why am I having diarrhea everyday? For a couple of weeks I been having diarrhea almost 2 times a day. I don't have any symptoms and I feel normal. When I go running I feel like I'm about to crap myself and by the way I'm 16 years old.

Try eating some more fiber in your diet. Fruits, vegetables, whole grains. If you continue to have diarrhea, a visit to your doctor may be warranted.

Well, that "Depends".
Have you been eating more fruit than you normally do, more chocolate, less water??

This might sound crazy, but running can do that to you. Especially long hard running.