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.
Does Milk Make Mucus? I have heard many reports that milk worsens nasal congestion. Do you ever advise patients to avoid milk or milk products for this reason? Although the belief that milk worsens nasal congestion, postnasal drip, respiratory congestion, or asthma is common, there is strong evidence against this belief. Researchers found no effect of milk on nasal secretions or on the symptoms of upper or lower respiratory tract mucus production.