Buddha said that children always cough because of cause and effect. What is the reason?

It's not necessarily cause and effect. Go to the hospital for a good check-up. It may also be congenital weakness. Enhance physical fitness I suggest that you let your child confess once or twice a day for 20 minutes each time, which is very helpful for improving physical fitness. (You can search "Hidden Earth Soft Text" and pay attention to it. You can see the effect in half a month. I was in poor health before. I persisted for more than a year, rarely caught a cold, and obviously felt that my physical fitness had improved. Drop out of school and exercise, kill two birds with one stone.