When your skin is red, itchy, and irritated, it could be a rash or it might be hives. We spoke with experts to learn how to ...

Patients with persistent fish allergy and parvalbumin sensitization had a low threshold for reactions, which were severe, ...

Learn when rashes signal medical emergencies. Color, location, and symptoms reveal dangerous conditions needing urgent care.

Allergies can affect multiple organ systems with skin reactions, vomiting, trouble breathing and dilating blood vessels. Anaphylaxis is a severe, life-threatening allergic reaction. Your doctor may ...