Sinusitis is when the spaces inside your nose (sinuses) become inflamed and swollen. This interferes with drainage and causes mucus to build up. The area around your eyes and face feels swollen, and you might have throbbing facial pain or a headache. Sinusitis can make it hard to breathe through your nose.
NB. Sinusitis is usually caused by an infection or allergies, but may on occasion be due to a lazy trigeminal nerve.
More posts related to sinusitis, as well as tips & strategies to "fix" the underlying bad body chemistry