If you feel like the membranes lining your sinus cavities frequently become inflamed and swollen, you may have a condition called Chronic Sinusitis, or Chronic Sinus Infection. This inflammation causes a blockage in the nasal passage that inhibits natural draining of mucus from the sinuses. This is what causes the discomfort you are feeling. Rather than draining, all the fluid builds up and causes pressure in your sinus cavities.
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