“Science has proven that smiling releases endorphins and other hormones that make you feel good,” she says. “When you smile in a crowd and other people smile back, you can make the whole room feel ...

There are many types of dental crowns and they're used for a variety of situations. Learn more about your teeth and crowns from the experts at WebMD.

Learn about the anatomy of the heart and how its chambers, valves, and vessels work together to maintain effective blood circulation throughout the body to sustain life.

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

They've gotten a bad rap over the years due to some athletes using them illegally, but steroids can help treat a variety of health conditions. Learn more from WebMD about the different types and ...

Excessive thirst and a dry mouth are telltale signs of high blood sugar. Learn more about diabetic thirst (polydipsia). Causes, symptoms, & what you can do.

Toothaches and jaw pain are common, but their sources can be very different. Learn more from WebMD about the causes, symptoms, diagnosis, and treatment of tooth pain.

A piece of fruit can be a good way to satisfy your sweet tooth, but they’re not all created equal. WebMD shows you which fruits have the most -- and least -- sugar.

Encephalopathy happens when a change in your body or your brain affects how well you think. Learn the causes, symptoms, treatments and more.

Find out how doctors diagnose lupus using lab tests, medical history, and physical exams.

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

Learn about what you should and should not do if your cat keeps you awake at night.