Rare, deadly, and often missed, some skin cancers develop in areas that rarely see the sun. Scientists are still learning about them, but here's what we know.

Alzheimer's disease affects an estimated 1 in 10 people over age 65. Find in-depth Alzheimer's information ...

Hoping to make your hair grow faster? Learn about hair-care tips, treatments, and tricks to nurture your hair and foster growth.

What you eat could make you feel better. Discover with the help of this WebMD slideshow foods, nutrients, and spices that can help lessen inflammation and ease your aches.

Nine out of ten people who have systemic lupus erythematosus are women. Get in-depth lupus information including its causes, symptoms, and treatments.

The best way to control your asthma is to avoid asthma triggers. Follow these easy, effective tips for asthma prevention and breathe easy.

WebMD provides information on familial hypertriglyceridemia, in which people inherit genes that put them at risk for high triglycerides.

Some pregnancies bring more than one bundle of joy. Find out how that happens, and learn more about multiple births.

Fasting: It’s simple and trending, though it’s been around for thousands of years. Find out from WebMD's slideshow whether it might be a good option for you and what the risks and benefits are.

In severe cases, a salicylate allergy can lead to anaphylaxis, which is a life-threatening reaction that is an emergency. But this is rare in the case of salicylate allergy.

Being overweight or obese puts you at risk for many serious health conditions, including diabetes, sleep apnea, and even cancer. Learn more from WebMD about diseases you can prevent by losing weight.

Chest retractions are a physical sign you're not getting enough air. Here's where they happen and why.