Recurrent sinus infections usually have a driver: untreated allergies, a deviated septum or polyps, chronic inflammation, or occasionally immune problems. Four-plus episodes a year, or one lasting 12-plus weeks, earns an ENT workup instead of another antibiotic.
The workup is straightforward: nasal endoscopy, sometimes a CT scan, and allergy testing, because treating the underlying allergy often breaks the cycle. The habits that help meanwhile: daily saline rinses (the best-evidenced sinus habit), a daily nasal steroid spray (safe long-term, unlike decongestant sprays capped at 3 days), proper allergy treatment, no smoking (smoke paralyzes the mucus-clearing cilia), and home humidity. The emergency exceptions: eye swelling or vision change, severe headache with stiff neck, confusion, or high fever, all signs of spread beyond the sinuses. And the expectation: when the driver is structural, fixes like polyp removal or septum surgery work well, so this is a solvable problem.
What to do
Common questions
Why do I keep getting sinus infections?
Sinus infections that keep coming back are a pattern with a cause, and the cause is findable. The usual drivers, per MedlinePlus: allergic rhinitis (untreated allergies keep the sinus linings swollen and blocked, which is the setup for infection), structural problems (a deviated septum, nasal polyps, or narrow drainage pathways that trap mucus), chronic inflammation that never fully clears between episodes, and less commonly, immune system issues or conditions like cystic fibrosis. The numbers that define the problem: four or more sinus infections a year, or one that never really leaves for 12-plus weeks (chronic sinusitis), is the threshold where the answer stops being another antibiotic course and becomes a workup. What that workup looks like: usually an ENT visit with a nasal endoscopy (a small camera, less dramatic than it sounds) and sometimes a CT scan of the sinuses, plus allergy testing, because treating the underlying allergy is often what breaks the cycle. What you can do before and alongside: daily saline rinses (the single most evidence-backed habit for sinus health), a daily nasal steroid spray for the inflammation (safe for long-term use, unlike decongestant sprays, which must stop at 3 days), treating allergies properly with antihistamines or shots, not smoking (smoke paralyzes the cilia that clear mucus), and humidity at home. The immediate red flags that are not routine recurrence: eye swelling or vision changes, severe headache with stiff neck, confusion, or high fever, which suggest spread beyond the sinuses and are emergencies. And the expectation to set: structural fixes like polyp removal or septum surgery exist and work well when that is the driver, so recurrent sinusitis is a solvable problem, not a life sentence.