Brown poop is normal and comes from a pigment called bilirubin. Green poop can happen from eating foods like spinach or due to gastrointestinal infections or severe diarrhea. Black, tarry poop can ...

Find out why dark spots appear and what can fade them. If you have what feels like razor bumps or acne on the back of your neck or scalp, you may have acne keloidalis nuchae. Find out what can help. A ...