If the rash is small and there is only mild itching and no other discomfort, you can temporarily take oral antihistamines at home for treatment. This type of medication includes loratadine tablets, azelastine hydrochloride tablets and levocetirizine hydrochloride tablets, and can be combined with oral vitamin C and calcium supplements to aid in desensitization treatment. You should also pay attention to avoid eating seafood, animal protein foods, spicy and irritating foods, and wear cotton, loose clothing to reduce alcohol and other stimulating factors. If the hives are severe, itching is obvious or accompanied by various uncomfortable sensations such as chest tightness, difficulty in breathing, and foreign body sensation in the throat, you should immediately go to a nearby hospital for medical treatment. Anaphylaxis may be caused by severe allergies, as well as other adverse consequences.