Urticaria is commonly known as rash. It is a localized edema reaction caused by the expansion and permeability increase of small blood vessels in skin and mucosa, which generally subsides within 2 ~ 24 hours, but new rashes appear repeatedly.
Antihistamines can be used to treat urticaria, relieve itching and diminish inflammation. Common antihistamines are: H 1 receptor antagonists such as diphenhydramine, cyproheptadine, chlorpheniramine, Avastin, cetirizine, mizolastine, loratadine, ebastine, azelastine, desloratadine, etc. When monotherapy fails, two different types of H 1 receptor antagonists can be used together or in combination with H2 receptor antagonists. Commonly used H2 receptor antagonists include cimetidine, ranitidine and famotidine.
Pay more attention to what factors cause allergies in daily life and try to avoid them.
I wish you a speedy recovery. If I can help you, I hope you can be adopted!