HOW ALLERGIES TRIGGER SINUS PROBLEMS
Allergens (allergy-causing substances) cause an immune system response throughout the body, but especially in the nasal regions of the face. These allergy symptoms can include sneezing, itchy, watery eyes, and a runny nose. As part of this response, nasal passages become inflamed and swollen. If the nasal congestion blocks the drainage of your sinuses, sinus congestion and pain can follow.
WHICH SINUSES ARE CAUSING YOUR SINUS PAIN?
in your forehead, vary greatly in size
behind your nose and between your eyes, about the size of a matchbox
behind your cheekbones, between the bottom of your eyes, and the top of your upper jaw, about the size of a large walnut
deep in your head behind your nose, about the size of a large grape