Why do you get bumps that look like rashes when walk in the cold?

When you walk in the cold, the blood vessels in your skin constrict to conserve heat. This can cause your skin to become dry, itchy, and red. In some cases, you may also develop bumps that look like rashes. These bumps are called cold urticaria, and they're caused by an allergic reaction to the cold.

Cold urticaria is a type of physical urticaria, which is a skin condition that causes hives or welts to form when the skin is exposed to a trigger. In the case of cold urticaria, the trigger is cold temperatures.

Cold urticaria can affect people of all ages, but it's more common in women than men. It can also be more common in people who have a history of other allergies or autoimmune diseases.

The symptoms of cold urticaria can vary from person to person. Some people may only experience mild itching and redness, while others may develop large, painful hives that can last for several hours. In some cases, cold urticaria can also cause more severe symptoms, such as difficulty breathing, dizziness, and fainting.

If you think you may have cold urticaria, it's important to see a doctor. Your doctor can diagnose the condition and recommend treatment options.

There is no cure for cold urticaria, but there are a number of things you can do to manage the symptoms. These include:

* Avoiding cold temperatures. This is the most effective way to prevent cold urticaria. If you know you're going to be exposed to cold temperatures, dress warmly and cover your skin with gloves, a hat, and a scarf.

* Taking an antihistamine. Antihistamines can help to relieve the itching and redness associated with cold urticaria.

* Using a cold compress. A cold compress can help to reduce swelling and pain.

* Taking a warm bath. A warm bath can help to relax the skin and relieve itching.

If you have severe symptoms of cold urticaria, your doctor may prescribe a corticosteroid or another medication to help control the condition.