That was what I thought.

you got to have him to have bowl movement every day.
check with GERD in google. it is back flow of stomack acid into the esophagus. the lung can be affected by the stomac acid and asthma could be caused in this way. If he coughes often after midnight or coughes a lot when he goes bed after a big dinner, he might have a reflux problem. it doesnot take a severe back flow to cause coughing and wheezing. and i think constipation might make the reflux problem worse.

a good way to ease constipation is to eat a bowl of blueberries either in the morning or before sleep. it helps to loosen the stool very well.