Inhaled glucocorticoids (ICS) and their combinations (ICS+LABA) are the most basic drugs currently used in asthma treatment. Most patients can achieve good asthma control with inhaled medication. Inhaled medications have the advantages of better control and fewer adverse effects because they reach the lungs directly. However, there are still patients who do not have the expected effect when using inhalation therapy. In addition to the fact that some patients do respond poorly to inhaled hormones, it is clinically necessary to consider whether the patient has used the inhaled medication correctly. The following summarizes the most common misconceptions about the use of inhaled drugs: 1. Improper storage. Patients mistakenly believe that low temperature is more conducive to the preservation of drugs, so the drugs are put into the refrigerator, but the aerosol inhaler is a powder, thawing and moisture caked into a block, can not be used. 2, not inhaled enough drug amount. Deep breathing before inhalation mouth to port, the drug powder blown away; powder left in the mouth; after inhalation did not close the mouth and pinch the nose resulting in part of the drug exhaled with breathing; 3, did not do a good job of oral care after the drug, residual drugs in the mouth easily lead to the normal flora imbalance. Easy to appear throat discomfort, dry itching, hoarseness, and even fungal infection; 4, not standardized treatment. Some patients are worried about the side effects of long-term use of inhaled hormones or think that they can stop taking the medication once the acute symptoms of asthma are relieved, showing poor compliance and failing to standardize treatment, which often leads to patients visiting the doctor or emergency room for another asthma attack. Understanding these misconceptions and avoiding unregulated medication will allow your condition to be effectively controlled as early as possible and for a long time.