Abdominal aortic aneurysm

Acute liver failure

Addison's disease

Alcoholic hepatitis

Alcoholic liver disease


Anaphylaxis is the most serious type of allergic reaction. It often occurs rapidly after exposure to an allergen and may be life-threatening.

Antibiotic-associated diarrhea

Aortic aneurysm



Barrett's esophagus

Behcet's disease

Bile reflux

Bladder stones

Bladder stones are small masses of minerals in your bladder — often forming as a result of an enlarged prostate, nerve damage or infection.

Blastocystis hominis infection

Blind loop syndrome


C. difficile infection

Carcinoid tumors

Cardiogenic shock

Celiac disease

Chagas disease


Are you worried you might have chlamydia? Find out how this common sexually transmitted infection is diagnosed and treated.


Chronic lymphocytic leukemia

Churg-strauss syndrome

Colon cancer

Colon polyps

Constipation in children

Crohn's disease

Cyclic vomiting syndrome

Cyclic vomiting syndrome can last for hours or days and shares many triggers with migraines.

Dengue fever

Diabetic ketoacidosis

Diabetic neuropathy


Diarrhea can have many triggers, including viruses, bacteria, parasites and certain medications. Though unpleasant, most cases of diarrhea go away without treatment.


E. coli

Ectopic pregnancy

Egg allergy


Enlarged liver

Enlarged spleen (splenomegaly)

Eosinophilic esophagitis



Fibromuscular dysplasia

Food allergy

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

Food poisoning has many forms, and some can be serious. Here's how to recognize food poisoning and ways to prevent getting sick.

Gallbladder cancer


Gallstones often don't cause symptoms. But if you have a gallbladder attack, you're not likely to forget it.


Gas and gas pains

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.

H. pylori infection

Hantavirus pulmonary syndrome

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.

Headaches in children

Heart attack

Hemolytic uremic syndrome (HUS)

Henoch-Schonlein purpura

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.

Hepatitis A

Hepatitis B

Hives and angioedema

Hives and angioedema — Comprehensive overview covers symptoms, causes, treatment of these common allergic disorders.


Hyperglycemia in diabetes

Inflammatory bowel disease (IBD)

Intestinal ischemia

Intestinal obstruction

Irritable bowel syndrome

Ischemic colitis

Kawasaki disease

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.

Kidney infection

Lactose intolerance

Lead poisoning

Liver cancer

Liver disease

Liver hemangioma

Mental illness

Mesenteric lymphadenitis


Milk allergy




Non-Hodgkin's lymphoma

Norovirus infection

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

Ovarian hyperstimulation syndrome (OHSS) — Comprehensive overview covers symptoms, treatment of this complication of infertility treatment.

Pancreatic cancer

Pancreatic cancer is often fatal. Find out which new treatments offer hope.

Pancreatic cysts


Pelvic inflammatory disease (PID)



Pinworm infection

Placental abruption



Porphyria is a group of inherited disorders that result from buildup of natural chemicals call porphyrins, which can cause nervous system and skin problems.

Postpartum preeclampsia


Primary biliary cirrhosis

Primary sclerosing cholangitis


Pseudomembranous colitis


Salmonella infection

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.

Scrotal masses

Sexually transmitted diseases

Shellfish allergy

Shigella infection

Small vessel disease

Symptom Checker

Foot pain? Headache? Sore throat? Skin rash? Use the Symptom Checker to find out what's causing your symptom.

Tapeworm infection

Testicular torsion

Toxic hepatitis

Traveler's diarrhea


Triple X syndrome

Typhoid fever

Ulcerative colitis


Vesicoureteral reflux

Whipple's disease

Wilms' tumor

Yellow fever

Zollinger-Ellison syndrome

June 21, 2013