PMS may seem like a fictional conditions used to give women license to get cranky a few days a month, but it does exist—at least to some degree.

A desire for disability? For people with Body Integrity Identity Disorder, it's an ever-present problem.

Though ingrown hairs and pimples look similar on the outside, the causes and symptoms of these two conditions can be very different. Do you know the difference between the two?

Cardiac arrest is fatal more often than not. Is there any way to prevent this serious heart condition?

Blisters can start to form if your sunburn is particularly bad. We take a look at how to deal with them safely.

A hairline fracture, also referred to as stress fracture, is one of the most common injuries in sports, but can happen to anyone. Here is a look at where they most commonly occur.

Night terrors are a parasomnia, or undesirable sleep behavior. Researchers suspect a genetic link may greatly influence the presence of night terrors, although no exact cause has been pinpointed.

Exactly as the name indicates, birthmarks are present from birth or very shortly after. But what causes them? Scientists haven’t quite figured that out.