A year-old baby sleeps at night coughing frequently may be related to cold and allergies, need to keep warm or take anti-allergy drugs and other relief. 1. cold: one year old baby sleep coughing at night if the cold stimulation caused, parents do not need to worry too much, sleep at night the baby is in a stationary state, phlegm accumulation, turn over when the phlegm caused by the movement, stimulation of the trachea caused by coughing, the baby’s spirit is good if you can not deal with it, do a good job of warmth, to prevent the cold again can be. 2. Allergy: If your baby’s cough is caused by allergy, it will usually attack at night, and you can give your baby some water to relieve it. Parents can take anti-allergy drugs under the guidance of the doctor, such as cetirizine hydrochloride drops, do not use without authorization. There may be other reasons why a one-year-old baby sleeps and coughs frequently at night, so it is recommended that parents take their babies to the hospital for examination and standardized treatment after clarifying the causes. All of the above medication should be used under the guidance of a doctor, avoid self-medication.