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.
Frontal
in your forehead, vary greatly in size
Ethmoid
behind your nose and between your eyes, about the size of a matchbox
Maxillary
behind your cheekbones, between the bottom of your eyes, and the top of your upper jaw, about the size of a large walnut
Sphenoid
deep in your head behind your nose, about the size of a large grape
SYMPTOMS OF SINUS CONGESTION
Sinus congestion and pressure are difficult to ignore. The feeling of “fullness” is caused by the blockage of sinuses, as opposed to nasal congestion. Most feel the blockage in the cheeks and often find it difficult if not impossible to breathe through their nose.