HI C.,
Yes, we used to have that problem. Sometimes sore throats and dry noses aren't sicknesses, so to speak, but reactions to environmental stimuli. If this is happening mostly at night you might have a laundry detergent he is sensitive to. Chemicals in the home can cause a sore throat, even without making it look red and sore. Remember your little ones are smaller than you and their lungs are more sensitive and breathe more breaths per minute than an adult.
Chemicals are also heavier than oxygen so whatever is in your house is settling closer to the floor where he is. Chemicals don't just safely sit on a shelf. They outgas...right through the bottle whether it is open or not! And to complicate matters they contraindicate just like a pharmaceutical does. How many chemicals are in your house? Just like prescriptions, with any more than two you don't know what damage they are doing.
My kids and I no longer have allergies. Allergies are reactions to things because the immune system is not working at it's optimum. When we detoxified the house our immune systems started working properly. We now actually have a furry inside dog with no problem.
Check this video out. It's about 20 minutes but it will confirm what I just said. The video link is on the right hand side of the page about half-way down. www.cbc.ca/consumers/market/files/home/cleaners
Let me know if you would like to know more. Detoxing can be very inexpensive. I'd be glad to help any way I can.
Regards,
M.