The symptoms you describe sound very much like my best friend's daughter who has asthma, so I am hoping (and will pray) that that is it. Whenever she gets a cold, she has a major asthma flare up, with the gunky cough, waking up in the middle of the night with a terrible cough that requires a nebulizer treatment, and the cough lasting forever. My friend homeschools her kids though, so they don't get exposed to the number of germs that your average kid is at school or daycare, especially when she is having a bout of this (I have to admit, it is easier to have a friend with kids who understands that a playdate will be cancelled by either party due to a runny nose, with the other person thankful you cancelled at the last minute! <img src="i/expressions/face-icon-small-wink.gif" border="0"> ), so after a few weeks, her cough will finally go away. It took a while for them to finally figure out which "kind" of asthma she has (cold inflamation, vs. allergy triggers, vs. enviromental, etc.)
My cousin has a child who caught a cold or some crud every week from the church nursery, and their doctor finally told them to keep him home for a while and give his immune system a rest- getting sick again before getting totally well from the last round of crud was taking a toll on his little body, so they took turns going to church for a while.
I don't know if this helps you or not, but maybe if he is in daycare, it is a combination of the two, especially if it is asthma. I hope you find the answers soon.
My cousin has a child who caught a cold or some crud every week from the church nursery, and their doctor finally told them to keep him home for a while and give his immune system a rest- getting sick again before getting totally well from the last round of crud was taking a toll on his little body, so they took turns going to church for a while.
I don't know if this helps you or not, but maybe if he is in daycare, it is a combination of the two, especially if it is asthma. I hope you find the answers soon.