Can smoking cause loss of smell?

Tobacco smoke exposes the nose to irritants that may cause swelling, dryness, and changes in the delicate smell-sensing area. Smell may seem weaker, altered, or absent. Smoking is not the only explanation: nasal allergies, a cold, sinus inflammation, COVID-19, and Long COVID can also affect smell. A blocked nose can reduce odours reaching the sensing area, while some illnesses affect smell more directly.

If you smoke, stopping or reducing exposure gives the nose a chance to recover and supports overall health. Avoid second-hand smoke, keep hydrated, and do not put objects or unprescribed products inside the nose. Notice whether the change began with congestion, an infection, or a new medicine, and record whether taste is affected too. Arrange a medical review if the change continues, keeps returning, or has no clear explanation.

Seek urgent medical help for sudden loss of smell with facial weakness, trouble speaking, confusion, severe headache, or other possible stroke symptoms. Prompt assessment is also sensible after a significant head injury, or if smell loss occurs with severe facial pain, swelling around an eye, or a high fever. Otherwise, a clinician can examine the nose and review possible causes when the problem persists.

Ask whether smoking, nasal inflammation, infection, or medicines could explain the change; whether you need a nasal examination or smell testing; and what support is available to stop smoking safely.