The best way to prevent Lyme disease is to not get bitten by a tick. Here's what you need to know about prevention, and what to do if you have a tick.

You've been told that you have celiac disease. This means that you are sensitive to a protein called gluten. Gluten is found in certain grains. When you ingest gluten, your immune system causes harm to your small intestines. The treatment for celiac disease is to stay away from foods and products that contain gluten. This sheet gives you the basics about a gluten-free diet.

After gastric bypass surgery, you will need to learn a new way to eat and drink. Your new stomach pouch is much smaller than it was before. And it has a small opening at the bottom called a stoma. This can become blocked by food if you aren't careful. Here are guidelines.

A HIDA scan is an imaging test. It can be used to check for problems in the liver, gallbladder, and bile ducts.

Learn about fluorescein angiography, an eye test that lets your healthcare provider examine the back of your eyes.

You have been diagnosed with prediabetes. Read on to learn more about this condition, and how to keep it from developing into diabetes.

An esophageal dilation is a procedure used to widen a narrowed section of your esophagus. This is the tube that leads from your throat to your stomach.

Do you often have burning pain in your chest? You may have esophagitis. This is when the lining of the esophagus becomes red and swollen (inflamed).

A large bowel obstruction occurs when part or all of your large intestine is blocked. As a result, waste can't move through your bowel correctly and out of the body. You must be treated right away to manage the blockage.

A small bowel obstruction is when part or all of your small intestine (bowel) is blocked. Then digestive contents can't move through the bowel correctly and out of your body. Read on for information about symptoms and treatment.