Helicobacter pylori (H. pylori) is a common bacteria. It is a cause of ulcers (sores). It weakens the mucus layer that coats the inside of the stomach and first part of the small intestine. Stomach acid can flow through the weakened layer and burn the tissue of the stomach wall.

Detailed information on what to do when your child has uncontrolled leakage of poop (stool).

Ulcerative colitis is a type of inflammatory bowel disease (IBD). It affects your child's large intestine (colon) and rectum (where stool is stored before leaving the body). Ulcerative colitis causes swelling, bleeding, and sometimes sores. Causes are unknown, but your child's symptoms can be managed.

Crohn's disease is a type of inflammatory bowel disease (IBD). It causes swelling, inflammations, and sores in your child's digestive tract. Read on to learn more about this condition.

Your child is having vomiting or retching (gagging) that goes on for hours, or even days. During this time, your child may also have headaches or stomach pain. Then it goes away for weeks or months at a time. Your child may have a rare problem called cyclic vomiting syndrome (CVS). CVS is sometimes known as abdominal migraine.

Lactose intolerance is not a milk allergy. Having lactose intolerance means that your child can't digest lactose. This is a sugar found in milk and other dairy products. Lactose intolerance can be managed. Here's what you should know.

Irritable bowel syndrome (IBS) is a relatively common condition in children. It affects your child's digestive tract, where food is broken down to give your child energy and help him or her grow. No one knows exactly what causes IBS, although it may be a result of the nerves in the intestine being overly sensitive, causing spasm and changes in the way the intestine contracts. IBS may come and go, but there are things you can do to help your child feel better.

Blood in your child's vomit or poop can be a sign of gastrointestinal (GI) bleeding. Many times, the cause of the bleeding isn't serious. But your child should always be seen by a doctor if GI bleeding happens. Read on to learn more.

Children with dysphagia have problems swallowing food or liquids. It often affects children who are just learning to eat solid foods. It can make it hard for your child to get enough nutrients for good growth. Read on to learn more.

To treat celiac disease, remove all sources of gluten from your child's diet. It's important to do this even if your child is not feeling sick. Removing gluten will prevent symptoms and health problems caused by celiac disease.