The first thing you need to do is to get rid of the allergens, and then you can take anti-allergy drugs such as loratadine orally, and glucocorticoid drugs externally, etc. You should consult your doctor in time and follow the doctor’s instructions. Allergy is generally due to contact with allergens caused by the body’s abnormal immune response, common systemic allergic diseases, including urticaria, drug dermatitis, etc., allergy severe laryngeal edema, anaphylactic shock, and even life-threatening. The first thing you should do is to get out of the allergic environment and avoid contacting the allergens again to avoid aggravation of the allergy. If the symptoms are mild, you can take oral antihistamines such as loratadine, cetirizine to relieve the systemic symptoms, red and itchy parts of the skin can be used externally with glucocorticoid drugs such as mometasone furoate ointment to relieve local discomfort. Allergic redness and itching is recommended to consult a doctor in a timely manner, in accordance with the doctor’s instructions standardized treatment, do not self-medication.