What happens if sinusitis isn't treated?

Quality of life: Complications ( brain abscess, vision loss) are possible with untreated sinusitis. Most cases of untreated sinusitis just lead to chronic sinusitis which can reduce a persons quality of life... Facial pain, pressure, discolored nasal discharge, post- nasal drainage... Etc.

Can be severe : Sinus infection can spread to the blood or brain and become much more serious problems.