Usually, when the body has an allergic reaction, compound dexamethasone cream, trimethoprim cream, tacrolimus ointment, vitamin B6 ointment and zinc oxide ointment can be used, but hormonal drugs like compound dexamethasone cream should be avoided in large quantities. Oral anti-allergy drugs should also be taken. The most commonly used anti-allergy drugs are antihistamines, which are most suitable for type I allergic reactions. Commonly used types of antihistamines are paracetamol, promethazine, tefillin, cialis, diphenhydramine, cyproheptadine, etc. This drug belongs to the H1 receptor antagonist, which can have a better therapeutic effect when allergic reactions occur in the skin mucosa, for example, it can be used for itching and local edema of the skin caused by mosquito bites.