The main danger of whiteflies to human skin is an allergic reaction. During the whitefly breeding season, the components of whitefly itself may be allergens, and the pollen, dust and other substances carried on its body may also be allergens. When human skin comes into contact with a large number of whiteflies, an allergic reaction may occur, which is mainly manifested by the appearance of red spots, pimples and bumps on the skin, accompanied by itching, stinging and other discomforts. After an allergic reaction occurs, it is necessary to quickly disengage from the allergen to avoid contact with whiteflies; wear a hat, face mask and other protective equipment when traveling. Secondly, you can use some symptomatic drugs, such as glycerine lotion; if the drug is not effective, you can use glucocorticosteroid cream under the guidance of a doctor, and oral anti-allergy drugs, such as chlorpheniramine maleate, cetirizine and so on. It is recommended to stay away from whitefly, if allergic symptoms occur after contact, please go to the hospital in time, active treatment, so as not to miss the condition.