When your skin breaks out in itchy, red welts after stepping into the cold, you’re not imagining it. This is hives from cold, a physical allergy triggered by exposure to low temperatures. Also known as cold urticaria, it’s not just about being chilly—it’s your immune system overreacting to cold air, water, or even a cold drink. Unlike seasonal allergies, this isn’t about pollen or dust. It’s your body treating cold as an invader, releasing histamine and causing swelling, itching, and sometimes worse.
People with cold urticaria, a type of physical urticaria that responds to temperature changes often notice symptoms within minutes of cold exposure. Holding an ice cube, swimming in cool water, or even walking outside in winter can trigger a reaction. In severe cases, it can lead to swelling of the throat, dizziness, or even anaphylaxis—especially if you’re submerged in cold water. That’s why it’s not just a skin issue; it’s a safety concern. Many don’t realize that antihistamines for cold hives, medications that block the histamine response are the first line of defense, but they don’t work for everyone. Some need higher doses, others need daily use just to stay protected.
The good news? You don’t have to live in fear of the cold. Understanding your triggers, carrying emergency medication, and knowing when to see a doctor can make a huge difference. The posts below cover real cases, treatment strategies, and how to avoid mistakes that make reactions worse. You’ll find what actually helps—like which antihistamines work best, why some people outgrow it, and how to recognize when it’s more than just a rash. No fluff. Just what you need to stay safe and in control.
Dec, 8 2025
Cold-induced urticaria causes hives and swelling after exposure to cold temperatures. Learn how it works, how it's diagnosed, and what treatments actually help-plus how to stay safe in winter and around cold water.