How does skin allergy do

Skin is always allergic, it is actually the root cause of personal constitution. Coupled with certain external factors, that is, allergens, thus triggering the physiological allergic reaction of the body. There are many common allergens, mainly environment, diet, temperature, mood, season, exercise, endocrine disorders, mosquito bites, contact items and so on, no matter which kind of it can cause repeated attacks, so you can check the allergen, know what you are allergic to, prevent contact can reduce the number of allergic attacks.