Coughing badly at night with a cold may be caused by sleeping position at night, increased vagus nerve excitability at night, or large temperature difference at night. 1. Sleeping position at night: it may be due to the patient sleeping flat on his/her back at night, the abdominal organs cause the diaphragm to move upward, which restricts the diastolic function of the lungs, resulting in a cough that is a little more severe at night. 2. Increased vagal excitability during the night: this condition can also lead to increased secretions, causing more phlegm in the airway and causing coughing, which is mainly coughing up secretions in the airway. 3. Changes in temperature at night: Changes in temperature at night, i.e. cold stimulation, can cause airway irritation. The airway itself is inflamed, coupled with hypersensitivity to external stimuli, so there is a severe cough. The patient is best to eat a light diet, drink more water, cough serious people can also follow the doctor’s instructions to take cough medication, such as strong cough syrup, compound licorice tablets and so on.