Achalasia is a disease that makes it hard to eat and drink normally. It affects your esophagus, which is the swallowing tube that connects the back of your throat to your stomach.

Achalasia is a rare disease that makes it hard to swallow foods and liquids. In achalasia, there is a problem with the tube that carries food from the mouth to the stomach (esophagus).

Pancreatitis is inflammation of the pancreas. It can be caused by gallstones, alcohol consumption, and certain medicines, among other causes.

Alcoholic hepatitis is liver inflammation and damage cause by drinking too much alcohol over time.

Alcoholic hepatitis is caused by excessive and chronic alcohol use and can progress to fatty liver and cirrhosis if the alcohol abuse continues. This video explores who is at risk for this disease and how your health care provider makes ...

An anal fissure is a small, painful tear in the lining of the anus. Anal fissures may hurt and bleed during or after a bowel movement, but about 90% heal without surgery.

An anal fistula is an abnormal opening in the skin near the anus. It leads to the inside of the anal canal in the colon.

An anorectal abscess is a collection of pus under the skin in the area of the anus and rectum.

Anorectal malformations are birth defects, or problems that happen as an unborn baby is developing during pregnancy. With this defect, the anus and rectum don’t develop properly. They are the lower part of the digestive tract.

Appendicitis is a medical emergency that happens when your appendix becomes sore, swollen, and diseased.

Appendicitis is a painful swelling and infection of the appendix. It is a medical emergency. The appendix can burst or rupture. This is serious and can lead to more infection. If not treated, it can be fatal.

Ascites is a condition that occurs when fluid collects in spaces in your belly. It can be painful and keep you from moving around comfortably. Ascites can set the stage for an infection in your belly. Fluid may also move into your chest ...

Autoimmune hepatitis is when your body’s infection-fighting system (immune system) attacks your liver cells. This causes redness and swelling (inflammation) and liver damage.

Barrett's esophagus is when the normal cells that line your food pipe (esophagus) turn into cells not usually found in your body. The new cells take over because the lining of the esophagus has been damaged. The new, abnormal cells are ...

Biliary atresia is a rare liver disease that occurs in infants. It is often found shortly after birth. The disorder affects tubes in the liver called bile ducts. If not treated with surgery, it can be fatal.

In blind loop syndrome, food is not able to follow the normal digestive route. Instead, it bypasses a section of your intestine.

An intestinal blockage interrupts the normal digestive process. Many possible causes can lead to intestinal blockage including scarring, a hernia, or tumors.

Celiac disease is a digestive problem that hurts your small intestine. It stops your body from taking in nutrients from food. You may have celiac disease if you are sensitive to gluten.

Colic is when a healthy baby cries for a very long time, for no obvious reason. It is a common problem that affects some babies during the first 6 weeks of life.

Collagenous colitis (CC) is a condition that affects your large intestine. It leads to episodes of watery diarrhea and belly pain.

Congenital liver defects are liver disorders that are present at birth. They are rare. These liver disorders usually block the bile ducts. This affects the flow of bile.

Constipation is when your stools are painful or they do not happen often enough. It is the most common GI (gastrointestinal) problem.

Constipation is when a child has very hard stools, and has fewer bowel movements than he or she normally does. It is a very common GI (gastrointestinal) problem.

Crohn’s disease is part of a group of diseases known as inflammatory bowel disease or IBD.

Crohn's disease is when there is redness, swelling (inflammation), and sores along the digestive tract. It is part of a group of diseases known as inflammatory bowel disease or IBD.

Diarrhea is when your stools are loose and watery. You may also need to go to the bathroom more often.

Diarrhea is a common problem. It may last 1 or 2 days and go away on its own. If diarrhea lasts more than 2 days, your child may have a more serious problem.

Diverticular disease is an infection in the tiny pouches that some people get in their colon. The pouches are called diverticula. These pouches bulge out through weak spots in your colon. The pouches can become inflamed (red, swollen) or...

Diverticuli are herniations in the muscular layer of the colon that make small, saclike swellings. Diverticulitis occurs when diverticuli become inflamed and infected. This video looks at the possible causes of this condition, typical ...

Diverticulosis occurs when part of the colon bulges through a muscular layer into the abdomen, called diverticula. Learn about this condition, possible complications, and what you should do if you have diverticulosis.