Cholinergic urticaria

Cholinergic urticaria is when your skin gets red and itchy because of sweat. When you exercise or get hot, your body makes sweat. Sweat is wet and helps to cool down your body. But, if you have cholinergic urticaria, your body does something funny with the sweat. Your body thinks the sweat is bad and makes your skin get red and itchy.

It's like when you get an itchy rash from a bug bite. But instead of a bug bite, your skin gets itchy and red because of sweat. When this happens, you might feel like you need to scratch your skin. But, it's not a good idea to scratch, because it can make the redness and itchiness worse.

If you have cholinergic urticaria, it's important to stay cool and dry. You can wear cool clothes and drink cold water to stay cool. It's also a good idea to avoid spicy foods, caffeine, and alcohol, because they can make you sweat more. If you take good care of yourself, your skin might stop being red and itchy.