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Anaphylaxis is the most serious type of allergic reaction. It often occurs rapidly after exposure to an allergen and may be life-threatening.
Are you worried you might have chlamydia? Find out how this common sexually transmitted infection is diagnosed and treated.
Cyclic vomiting syndrome can last for hours or days and shares many triggers with migraines.
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.
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.
Hives and angioedema — Comprehensive overview covers symptoms, causes, treatment of these common allergic disorders.
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.
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.
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