Anaphylaxis is the most serious type of allergic reaction. It often occurs rapidly after exposure to an allergen and may be life-threatening.
Antibiotics save lives, but they can also have side effects. The most common are mild to severe diarrhea and a serious type of colitis.
Bladder stones are small masses of minerals in your bladder — often forming as a result of an enlarged prostate, nerve damage or infection.
Celiac disease is an immune reaction to gluten, a protein found in certain foods. As a result, the body is unable to absorb some important nutrients.
Are you worried you might have chlamydia? Find out how this common sexually transmitted infection is diagnosed and treated.
Churg-Strauss syndrome is a rare disorder marked by blood vessel inflammation that affects organs throughout the body. Asthma is the most common sign.
Constipation in children is common. Often, simple changes in diet and routine are helpful.
Cyclic vomiting syndrome can last for hours or days and shares many triggers with migraines.
Diarrhea can have many triggers, including viruses, bacteria, parasites and certain medications. Though unpleasant, most cases of diarrhea go away without treatment.
Encopresis occurs when a child resists having bowel movements, causing stool to collect in the colon and rectum. Leakage of liquid stool also is common.
An enlarged spleen is usually a sign of an underlying problem. Treatment varies, depending on what's causing the enlargement.
Food allergy symptoms can make you miserable. Unfortunately, there's no cure — but there are steps you can take to keep your symptoms in check.
Food poisoning has many forms, and some can be serious. Here's how to recognize food poisoning and ways to prevent getting sick.
Gallstones often don't cause symptoms. But if you have a gallbladder attack, you're not likely to forget it.
Intestinal gas can be embarrassing and sometimes painful. But a few simple measures can often provide relief.
Gonorrhea is a highly contagious sexually transmitted infection. Without treatment, serious complications can occur.
Hantavirus pulmonary syndrome is initiated by a rodent-carried virus that infects the lung tissues, bringing on flu-like symptoms, respiratory problems and even death.
Hemolytic uremic syndrome is an uncommon condition that can cause life-threatening kidney failure, especially for children and older adults.
Henoch-Schonlein purpura causes inflammation of small blood vessels (vasculitis) and often a purplish rash. It's most common in children ages 2 to 6.
Hives and angioedema — Comprehensive overview covers symptoms, causes, treatment of these common allergic disorders.
Indigestion can ruin meals and make you feel uncomfortable. Take steps to prevent symptoms like upset stomach, bloating and pain.
Kawasaki disease — the leading cause of acquired coronary disease in children — causes artery wall inflammation throughout the body. It affects children younger than age 5.
Liver hemangioma is the most common type of noncancerous (benign) liver mass. Learn how doctors treat liver hemangioma.
Mesenteric lymphadenitis is an inflammation of the lymph nodes in the tissue that attaches various organs to your abdominal wall (mesentery). It mainly affects children.
Miscarriage can be heartbreaking. It might help to understand possible causes and treatment options, as well as what to expect for the future.
Nonalcoholic fatty liver disease is associated with obesity and diabetes. Lifestyle changes may prevent it from becoming serious.
Noroviruses cause an intestinal flu-like illness that typically resolves within days. Norovirus infection is highly contagious, especially in closed settings like hospitals and cruise ships.
Ovarian hyperstimulation syndrome (OHSS) — Comprehensive overview covers symptoms, treatment of this complication of infertility treatment.
Pancreatic cancer is often fatal. Find out which new treatments offer hope.
The pain of pancreatitis, an inflammation of the pancreas, can last for days, or in chronic cases, for years. Pancreatitis can lead to serious complications.
Porphyria is a group of inherited disorders that result from buildup of natural chemicals call porphyrins, which can cause nervous system and skin problems.
Salmonella infection will cause only diarrhea and stomach pain in some people, but for infants and immunocompromised people, this bacterial illness can cause life-threatening complications.
Foot pain? Headache? Sore throat? Skin rash? Use the Symptom Checker to find out what's causing your symptom.
Toxic hepatitis is liver damage that occurs when your liver isn't able to break down certain toxins — including common pain relievers such as Tylenol.
Traveler's diarrhea is unpleasant. Find out how to avoid this travel-related health problem.
June 21, 2013
- Abdominal pain syndrome. American College of Gastroenterology. http://patients.gi.org/topics/abdominal-pain/. Accessed April 10, 2013.
- Ferri FF. Ferri's Clinical Advisor 2013: 5 Books in 1. Philadelphia, Pa.: Mosby Elsevier; 2012. http://www.mdconsult.com/books/about.do?eid=4-u1.0-B978-0-323-08373-7..00002-9&isbn=978-0-323-08373-7&about=true&uniqId=343863096-23. Accessed April 10, 2013.
- Wilkinson JM (expert opinion). Mayo Clinic, Rochester, Minn. April 14, 2013.