Since the bag is sealed, the pressure inside cannot equilibrate with the outside pressure. If the sinuses are clogged, the same thing happens in your head, which causes pain.” Therapy is based on ...

Your sinuses are hollow cavities in your face located around your ... in the sinus area that might radiate to the rest of the head. "People typically talk about it like a pressure feeling ...

It's not quite that simple. Allergies can cause sinus congestion, which can make your head hurt. Treatment for your allergies can ease that congestion, but it won't relieve your headache pain.