In severe cases the rash may cause blistering and hives. What is it? This is another allergic reaction caused when a chemical reacts with the sun in a way that causes an allergen - and therefore ...

A sun rash is an immune system reaction to sunlight exposure that causes itchy bumps, raised patches, or blisters on your ...

is a condition in which the skin experiences adverse reactions to sun exposure. It typically shows up as an itchy, red rash, but a sun allergy can also cause pain, raised patches of skin ...

"While it is not a true allergy, cold urticaria is often referred to in everyday language as an allergic reaction to cold. "It is a rare condition that results in rashes or hives." ...