Most allergy sufferers are common as pollen in spring, but there are some that are truly rare, example:
Solar Urticaria
Why not just vampires, goths and geeks are the ones who have to avoid the sun appears, as some people are allergic to sunlight, so a small percentage of the population can cause hives and itching, even through sunscreen and light clothing.

Urticaria Aquagene
For some people, the mere act of taking a shower is a danger to them, in mild contact with water can be handled with a steady diet of antihistamines, but there have been cases where even a high percentage of humidity, a foggy day can cause rashes and blisters, to those affected by this strange allergy.

Cholinergic urticaria
For some people it is the chemistry of water that provokes allergy but secreted chemicals from their bodies, sweat. Exactly the reason why there is the rash, urticaria, is not known yet.

Cold-induced urticaria
Most allergies are caused by physical elements, but there are a handful that are reactions to environmental conditions, including cold, so those who suffer from this strange ailment must fight the cold so that they become more resistant to most people who suffer from this allergy, swimming is extremely dangerous, as it reduces the temperature of the entire body to the point that brings in anaphylaxis.

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