Allergies can cause hives, and foods like nuts, milk, and eggs are common triggers. Environmental factors like sunlight, water, and heat can cause hives in some people. Stress can make hives worse, ...

Hives, or urticaria, can occur for many reasons, such as exposure to an allergen or a physical trigger, like pressure from tight clothing. It may also indicate an infection or another underlying ...

Add Yahoo as a preferred source to see more of our stories on Google. Hives are a term used to describe a medical condition known as urticaria, a skin disorder that occurs when the body's immune ...

Learn how cold urticaria causes hives, swelling and potentially severe reactions, plus how to recognize triggers, prevent symptoms and get proper treatment.

IT’S a chilly morning and you’ve just set off for work, when your brisk pace is suddenly stilled by an unbearable itch.

Urticaria/Hives: The Search Continues for Causes — "It's a puzzle and we're constantly trying to fit the pieces together" by Kristin Jenkins, Contributing Writer, MedPage Today Reviewed by Steven R.

Sadie Tessmer, 14, said she was diagnosed four months ago with aquagenic urticaria, which causes a person's skin to erupt in red, itchy hives if exposed to water. Collects/PA Real Life A 14-year-old ...

Every year, about 20% of Americans will get hives—those itchy, red bumps or welts that can appear after a day in the garden, taking medication, being bitten by a bug or for no apparent reason at all.