Does chronic sinusitis cause loss of smell?

Chronic sinusitis keeps the lining of the nose and sinus openings inflamed. Swollen tissue and thick mucus can narrow the route that air takes to the upper nose, where smell is detected. The change may be partial, complete, constant, or worse during flare-ups. Taste can also seem weaker because smell contributes to flavour.

Loss of smell has several possible explanations, including a recent viral illness, nasal polyps, allergies, medication effects, or a problem affecting the smell nerves. A clinician can consider the pattern, examine the nose, and decide whether testing is needed.

Arrange a medical review if reduced smell continues, returns repeatedly, or occurs with ongoing nasal blockage, facial pressure, thick discharge, or a cough from mucus. Keep a note of when it began, whether one or both sides are affected, and whether infections or allergies worsen it.

Treatment depends on the cause. A clinician may discuss measures that reduce nasal inflammation or improve drainage, and may check for polyps or another blockage. Do not stop prescribed medicines or use medicated nasal sprays for longer than directed without advice.

Seek urgent medical help for sudden loss of smell with weakness, confusion, trouble speaking, or a severe new headache. Prompt assessment is also sensible for swelling around an eye, vision changes, severe facial pain, high fever, or a one-sided blockage with bleeding.

Could sinus inflammation or a nasal polyp explain my reduced smell? Do I need an examination of the nasal passages? Which treatments are suitable for my symptoms, and when should I return if my sense of smell does not improve?