I get several visits a day with what seems to be sinusitis, ear infections, and sore throats. Some of these are legitimate but most are allergy symptoms. When I ask my patients if they have allergies, often they don't even realize that they do!
The ones that do know, just don't take the process seriously. They say "I take my medicine when I need it." This is the wrong approach! If you need the med, it's too late.
Allergies are only controlled and not cured. Please take your allergy meds on a DAILY basis and then they won't progress into a sinus infection.