One-year-old baby cough phlegm need to identify the cause, may be dry climate and other physiological factors, may also be respiratory tract infection, cough variant asthma and other pathological factors. Physiological factors need to adjust the lifestyle, disease caused by the need for targeted treatment under the guidance of a doctor, such as drug therapy. 1. Physiological factors: a year-old baby if the long-term no water, long-term in dry weather and other physiological factors can lead to respiratory mucosal stimulation, causing cough, cough for a long time phlegm, it is recommended to give the baby more water, and avoid a long time in a dry environment, pay attention to indoor air circulation. 2. Respiratory tract infections: if caused by viruses, generally can be self-cured, without special medication. If combined with bacterial infection, should follow the doctor to use cefixime, amoxicillin and other antibacterial drugs. Cough is the body’s normal way of expelling germs, it is not recommended to give children cough suppressants, you can take honey or hot pear soup to relieve throat discomfort through daily use. 3. Cough variant asthma: also belongs to a kind of asthma. Inhaled glucocorticoid drugs, such as budesonide inhalation aerosol, can be given under the guidance of a doctor. One year old baby cough phlegm by adjusting the lifestyle is ineffective, should be timely to the hospital, identify the cause of the disease, symptomatic treatment. All of the above medications should be used under the guidance of a doctor, avoid self-medication.