The possibility of allergic diseases is higher when you sleep at night. 1, urticaria, at this time can appear the wind, edema erythema, and the rash is indefinite, sometimes up and down, fading without trace, can soon subside, scratching can appear skin scratches. At this time, antihistamine drugs can be applied, such as olopatadine hydrochloride tablets, loratadine citrate tablets, loratadine syrup, avastin tablets, fexofenadine hydrochloride tablets; topical application of glycopyrrolate lotion. 2, the emergence of pruritus outside of any rash, is more likely to be pruritus, can also apply the above anti-allergy treatment program. 3, the emergence of erythema, papules, scratches, as well as vesicles, oozing and other polymorphic Eczema caused by rashes, the treatment remains the same as above anti-allergy treatment.