WebMD explains the causes and symptoms of the different types of heart disease, including coronary artery disease, arrhythmias, heart failure, and heart valve disease.

Pink eye can be caused by allergies. Learn more from WebMD about the symptoms, treatments, and prevention of allergic conjunctivitis.

Hysteroscopy: If you’re having certain symptoms, like a heavy menstrual period, a hysteroscopy may help your doctor diagnose or treat your problem. Learn what the procedure is and what to expect.

Asthma is a difficult condition to diagnose, especially in children, and is often diagnosed after other conditions are ruled out. Learn more about the diagnostic process for asthma and the tests ...

Eye Floaters - Understand the causes, symptoms, and treatment of eye floaters, and when to seek immediate medical attention.

That glass of wine with dinner might do more for you than take the edge off a long day. Check out these possible health benefits of drinking in moderation by clicking through the WebMD slideshow.

Discover the digestive system and understand its intricate processes. From mouth to the intestines, learn about each organ's role in digestion.

Polycystic ovary syndrome, or PCOS, has a number of symptoms associated with it. Many of the symptoms of PCOS are common issues that many women deal with in their lives, so it may be many years ...

Psychotic depression is a very serious mood disorder that requires hospitalization. Learn more from WebMD about the symptoms and treatment of psychotic depression.

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.

Learn the symptoms and how to diagnose a heart attack, treatment options, and what you can do to reduce your risk.

Find information for teens on sex, puberty, relationships, and lifestyle at the Teen Health Center.