Short answer: Sinusitis can usually be controlled very well, and many people stay symptom-free for long periods. Acute sinusitis often settles completely. Chronic sinusitis is managed rather than 'cured overnight', using sprays, rinses, treating allergies or a blocked nose, and surgery only when medicines are not enough.
Whether sinus problems settle for good depends on the cause. A one-off infection after a cold usually clears fully. Repeated or long-standing sinusitis is often driven by something underneath, such as a deviated septum, nasal polyps, swollen turbinates or allergy. When that underlying cause is found and treated, symptoms may reduce significantly. A nasal endoscopy in the clinic helps an ENT see what is blocking drainage. The aim is long-term control with the least treatment needed, so the honest answer is 'very manageable' rather than a promise of a permanent cure.
General patient education. An individual consultation is needed to assess your symptoms and treatment options.
