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 ...

— meaning the cause is unknown — or it could be prompted by a variety of factors that combine and make hives linger. Unlike acute hives, a condition that lasts for short periods and tends to be ...

Easily confused by the difference between hives versus rashes? You’re not alone. Considering how similar they look, it’s common to get them mixed up. “The term ‘rash’ generally applies to an ...