Gastric polyps are abnormal growths on the inner lining of your stomach. Learn about the different types, what causes them, and how they're treated.

Pancreatic pseudocysts are collections of leaked pancreatic fluids. They may form next to the pancreas during pancreatitis.

Supraventricular tachycardia (SVT) is a fast heartbeat that is abnormal. Learn more about this condition, including causes, symptoms, diagnosis, and treatment.

Secondhand smoke is the smoke you are exposed to when someone nearby is smoking. It includes the smoke exhaled by the smoker, and the smoke given off directly by the burning tobacco.

Optic neuritis is a condition that affects the eye and your vision. It occurs when the optic nerve is inflamed.

Dystonia is a body movement disorder. It causes your muscles to contract, move involuntarily, or get stuck in an abnormal position.

As a transgender person, you may have special health concerns. Being honest and open with your doctor will help you get the best care possible.

Some doctors specialize in treating people who are obese or overweight. They are called bariatric doctors or bariatricians. Some of these doctors may also be bariatric surgeons. Read on to learn more.

Sick sinus syndrome (SSS) is a type of abnormal heartbeat, or arrhythmia. If you have SSS, you may have episodes when your heart beats very slowly, stops beating for a short while, or beats very rapidly.

Acute liver failure is when your liver suddenly starts to not work. This often happens right after an overdose of medicine or poisoning.