In-depth

Addison's disease

Agoraphobia

Amyloidosis

Anaphylaxis

Anthrax

Antibiotic-associated diarrhea

Appendicitis

Ascariasis

Bee sting

Behcet's disease

Bird flu (avian influenza)

Blastocystis hominis infection

Blind loop syndrome

C. difficile infection

Carcinoid syndrome

Carcinoid tumors

Celiac disease

Chagas disease

Cholera

Churg-strauss syndrome

Colon cancer

Colon polyps

Crohn's disease

Cryptosporidium infection

Cyclic vomiting syndrome

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

Cyclospora infection

Cytomegalovirus (CMV) infection

Diabetes insipidus

Diabetic neuropathy

Diverticulitis

Drug allergy

E. coli

Ear infection (middle ear)

Ebola virus and Marburg virus

Ehrlichiosis

Endometriosis

Fecal incontinence

Food poisoning

Giardiasis

Graves' disease

Hantavirus pulmonary syndrome

Hirschsprung's disease

HIV/AIDS

Hunter syndrome

Inflammatory bowel disease (IBD)

Intestinal ischemia

Intestinal obstruction

Intussusception

Irritable bowel syndrome

Ischemic colitis

Jet lag disorder

Kawasaki disease

Lactose intolerance

Legionnaires' disease

Listeria infection

Malaria

Mesenteric lymphadenitis

Milk allergy

Myocarditis

Nicotine dependence

Norovirus infection

Ovarian hyperstimulation syndrome

Peanut allergy

Pelvic inflammatory disease (PID)

Peritonitis

Plague

Porphyria

Premenstrual syndrome (PMS)

Preterm labor

Primary biliary cirrhosis

Primary sclerosing cholangitis

Proctitis

Pseudomembranous colitis

Q fever

Radiation sickness

Rectal cancer

Reye's syndrome

Roseola

Rotavirus

Serotonin syndrome

Severe acute respiratory syndrome (SARS)

Shellfish allergy

Shigella infection

Smallpox

Social anxiety disorder

Swine flu (H1N1 flu)

Tapeworm infection

Toxic shock syndrome

Trichinosis

Tularemia

Typhoid fever

Ulcerative colitis

Vesicoureteral reflux

Vitamin deficiency anemia

Wheat allergy

Whipple's disease

Zollinger-Ellison syndrome

Sept. 02, 2016