Budesonide is a hormone drug, after the drug is administered by mouth inhalation, there is a certain amount of residue inside the mouth, after the hormone drug residue in the mouth, if you do not rinse out the mouth will cause bacteria in the oral cavity, especially fungi and other infections, but also can cause mucosal erosion, edema. Therefore, after using Budesonide, you must rinse your mouth to wash out the residual drug in the mouth, so as not to cause bacteria, viruses and other pathogenic microorganisms to multiply. Budesonide is often used in the treatment of chronic obstructive pulmonary disease, bronchial asthma and other diseases, which is a hormone drug, must pay attention to the usage and dosage, if the condition is stable can gradually reduce the dosage.