Talk to Allergy Specialist on Allergy

By 2 month, My brother got allergy and after few days his lips got swell, sometime his body got redness, which fade by taking medicines, but we don't know which thing cause him allergy may be by perfume, food, or something we get to know that which thing cause him allergy, because firstly we think its by perfume, then we think its by tang but today he don' t take both of thing but drink slush only