Erythromycin ointment is not used for the treatment of hives, which belongs to the macrolide group of antibiotics and acts mainly as an anti-infective. Generally speaking, erythromycin can be used for the treatment of septic skin diseases such as impetigo and small burns, ulcer surface infection. The main ingredient of this product is erythromycin, which can not be used to treat urticaria disease, this product occasionally see irritation, redness and other allergic reactions. Allergic to the product is prohibited, the use of avoiding the eyes, contact with mucous membranes, burning, itching and other discomforts stop, rinse clean, consult a pharmacist if necessary, pregnant women, lactating women should be used under the guidance of a physician, children stop under supervision, the drug is prohibited when the properties of the drug have changed. Urticaria belongs to the edematous mass elevated on the surface of the skin and mucous membranes, the main cause and food and drug allergy factors, so it will induce mast cells to release inflammatory mediators, inflammatory cell activation, which will lead to vasodilatation and increased permeability, and the emergence of systemic allergic symptoms. For the treatment of urticaria, it is necessary to remove the triggering factors in a timely manner, and then cooperate with the doctor to choose the local application of glycerine lotion can play the purpose of astringent and itch relief, if necessary, follow the doctor’s advice to choose oral loratadine, cetirizine and other antihistamines to improve the symptoms of urticaria. It is recommended that patients with urticaria, under the guidance of a doctor to use medication, not blindly self-medication, in order to avoid adverse effects.