Chronic sinusitis is a long-lasting sinus inflammation (swelling) and infection. it can linger over a period of time, typically longer than 12 weeks. the sinuses are four paired cavities (spaces) in the head. these spaces are connected by narrow channels. 19 jul 2020 sinus infections (sinusitis) is when cavities around the nasal passages become chronic sinusitus symptoms last 12 weeks or longer. Acute sinusitis causes the spaces inside your nose (sinuses) to become inflamed and swollen. this interferes with drainage and causes mucus to build up. with acute sinusitis, it might be difficult to breathe through your nose. the area around your eyes and face might feel swollen, and you might have throbbing facial pain or a headache. acute sinusitis is mostly caused by the common cold. unless a bacterial infection develops, most cases resolve within a week to 10 days and home remedies may be Chronic Rhinosinusitis Racgp Sinusitis is considered chronic after at least 12 weeks of symptoms. ac...