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Ankle injuries and ankle disorders can affect tendons and cartilage. Learn about different kinds of ankle problems including sprains and fractures. READ MORE

You may know that some animal diseases can have an effect on humans. Find out more about animal diseases and your health. READ MORE

Wild animals might attack if they are threatened or acting protective. Attacks by pets are more common. Learn how to avoid both types of animal bites. READ MORE

Angioplasty is a procedure to restore blood flow through narrow or blocked arteries. Learn about how stents and angioplasty work. READ MORE

Angina is chest pain or discomfort when there is not enough blood flow to your heart muscle. Learn about angina symptoms and treatment. READ MORE

An aneurysm is a bulge in the wall of an artery. It can develop and grow for years without causing any symptoms. Learn about tests and treatment. READ MORE

Local, regional, general - all are types of anesthesia. Learn about how anesthesia reduces or blocks pain before a surgery. READ MORE

Anemia occurs when your blood doesn't carry enough oxygen to the rest of your body. Read about conditions that lead to it and treatments available. READ MORE

Anaphylaxis or anaphylactic shock is a serious allergic reaction. It can begin very quickly, and symptoms may be life-threatening. Read the symptoms. READ MORE

Anal disorders include hemorrhoids, fistulas, and abscesses. Learn about which anal conditions are minor and those that are more serious. READ MORE

Anal cancer is rare. HPV is one of the most common causes. Find out more about anal cancer symptoms, diagnosis, and treatment. READ MORE

Thinking about using anabolic steroids to build muscles or improve your athletic performance? Think again. Misusing them is not legal or safe. It can cause long-term health problems. READ MORE