A child’s strong cough at night is mainly due to hyperactive vegetative nerve function at night, which leads to increased secretion in the trachea. The increase in cough due to sputum stimulation is mainly due to the following: 1. Acute bronchitis, bronchopneumonia and pneumonia and other lower respiratory tract infections, due to local inflammatory stimulation, there will be sputum secretion in the trachea, which requires active anti-infective treatment, combined with cough and phlegm relief 2. Bronchial asthma or allergic cough, which is due to the change of position during sleep that causes breathing difficulties and increased cough in babies with allergic constitution, requires nebulized symptomatic treatment with budesonide, terbutaline, etc., which can significantly relieve.