In a hiatal hernia, part of your stomach pushes up into an opening (the hiatus) in your diaphragm. Learn more about this condition, including cause, risk factors, symptoms, diagnosis, and treatment.

Rheumatic heart disease is a condition where the heart valves have been permanently damaged by rheumatic fever.

Hepatitis A is a liver disease that is easily spread from person to person. Hepatitis is a inflammation of the liver that sometimes causes lasting damage. Hepatitis A is a cause of hepatitis.

Hemorrhoids are when the veins or blood vessels in and around your anus and lower rectum become swollen and irritated. This happens when there is extra pressure on these veins.

Helicobacter pylori (H. pylori) is a type of bacteria that infects your stomach. Learn more about this infection, including cause, risk factors, symptoms, diagnosis, and treatment.

Detailed information on heart disease prevention

Peripheral vascular disease (PVD) is a slow and progressive circulation disorder caused by narrowing, blockage, or spasms in a blood vessel.

Gastritis is inflammation of your stomach lining. Learn what can cause it, make it worse, and how to care for yourself.

Gastroparesis is a disorder involving your stomach muscles. Learn more about this condition, including cause, risk factors, symptoms, diagnosis, and treatment.

Everyone has gas. It may be painful and embarrassing, but it is not dangerous. Learn what causes it, the symptoms, how it's diagnosed, and how it's treated.