As someone with asthma and allergies, I regularly cough up phlegm.  I find I
often need to cough up stuff a few minutes after eating.  I don't think (but
I don't know and that's why I'm asking) this is indicative of a food allergy
and I tested negative for all food allergies at my doctor.  To date I
haven't noticed any pattern in terms of what I eat and when I need to clear
my lungs.  Is it common for the process of eating to somehow start up
whatever process creates mucus in the lungs?

Thanks in advance.

-S-