Allergies are caused by failure of immune substances that are harmless, in which a person's body becomes hypersensitive. Allergies occur when there is contact of the substance or substances which are generally immunogenic ( antigenic ) or the person in question is said to be atopic on normal people usually do not cause a reaction. The materials are called allergens causing hypersensitivity. Initial action is usually done to avoid such allergy : Avoiding substances that are suspected allergen Keeping the environment clean and ourselves Keeping the humidity of the room by adjusting the wind and air circulation. if you use air conditioning (AC ) is recommended not to be used for 24 hours. Maintain cleanliness of clothes and change bed linen at least once a week Keeping the intake of food and beverages Consultation with a doctor and do an allergy test to find out which allergens should be avoided