Seven-month-old baby with cold and cough, phlegm, if accompanied by clear runny nose, nasal congestion, must give baby more water, less contact with cold personnel, do not go to airtight places, pay attention to monitor the temperature to avoid fever, usually is 5-7 days to heal. Pay attention to the baby to keep warm and avoid letting the child catch cold again. Try to eat and drink if it starts to get worse at night while sleeping, or if it is accompanied by fever, it is better to go to the doctor and listen to the bronchial tubes or lungs for rales and other symptoms.