Drink more fluids. Water helps loosen mucus and soothe an irritated throat. Dry, hacking coughs respond to honey in hot water, tea, or lemon juice. Do not give honey to children younger than 1 year of age. Elevate your head with extra pillows at night to ease a dry cough. Try a cough drop to soothe an irritated throat.
That is actually true to a certain extent. Most of the time you need to have some sort of sensitivity/allergy to dairy. But dairy products can increase the thickness of your phlegm, therefore can clog up your sinuses, and eventually cause the sinus pressure.
Talk about scared. There had to be another solution. I'd heard that dairy can contribute to congestion but considered not being able to breathe or smell a fair trade for cheese. It's been two months of being dairy free, and now that fall is in full swing, I should be miserable with allergy stuffiness and sinus pressure.