Adults can be nebulized if they have a strong cough with a lot of phlegm that is not easy to cough up after catching a cold. Most people with a cold, with the nasal congestion, runny nose and other symptoms subside, accompanied by a cough will gradually disappear. In some patients, the cough lasts for a long time, often aggravated by inhaling cold air, waking up in the morning or going to bed at night, mostly dry cough or coughing up a small amount of white mucous sputum, which is easy to cough up. The cough can be relieved and disappear gradually within 2 months. This situation does not require nebulization. A small number of patients with severe cough accompanied by thick sputum is not easy to cough up when available medication, nebulized inhalation can make the drug directly on all levels of airways or alveoli, the effect is also better. Cough can be controlled in a timely manner, reducing the pain of patients and improving the quality of life. Adults coughing after a cold should go to the hospital in a timely manner, under the guidance of the doctor to decide whether the need for nebulizer treatment, to avoid their own home nebulizer treatment.