Red bumps on the body when staying in a hotel can be an allergic reaction on the body. The most common type of this allergic reaction may be papular urticaria, and most of the formation is seen as an inflammatory reaction due to mite allergy. Mites may parasitize bedding, bed sheets and other parts of the body, if not strictly disinfected and cleaned, may cause the breeding of mites and the appearance of allergic symptoms, so the appearance of red bumps on the body, mainly in the form of pimples, pimples, or even the appearance of blisters on the basis of erythema, and some erythemas and wind spots may appear to be fused to a certain extent. If it is not accompanied by obvious fever, oral antihistamine drugs can be.