1. Nocturnal cough is mostly considered to be caused by postnasal drip. It is recommended to use Keratan (from Merck Sharp & Dohme) or Centrum (from UCB) 2.5mg once a night before bedtime. Combine with Ambroxol hydrochloride 7.5mg/dose (depending on the concentration, 2.5ml if it is 0.3% or 1.25ml if it is 0.6%), twice daily. Medication for 1-2 weeks, and no symptoms for more than 3 days. 2, if there is again high fever, yellow nose, yellow sputum, only then may be secondary to bacterial infection, then add antimicrobial in time. 3, the recommended medicine to eat, and then assist nebulization on the can.