The flushing of the face after nebulization may be due to irritation or allergy of the nebulized medication to the skin. Nebulization therapy is a direct therapeutic effect on the bronchi and lungs by bringing the medication into the lungs through nebulization. Most nebulized medications are bronchodilators and hormones that can be inhaled. Hormones have a strong irritating effect on the skin, so patients should protect their face before nebulizer treatment to prevent irritation or allergic reactions from excessive nebulizer medication on the facial skin during the treatment. In addition, patients should also rinse their mouths in time after nebulizer treatment to prevent the nebulizer drugs from affecting their mouths, and if the patients’ skin is fragile they should take precautions in advance.