Loss of Smell — Causes, Symptoms and When to See a Doctor

Loss of smell or anosmia can be temporary or permanent and became widely recognised as a symptom of COVID-19.

What causes Loss of Smell?

Loss of Smell can have many different causes ranging from minor to serious. The most common causes include viral infection COVID-19 sinusitis nasal polyps head injury ageing neurological conditions.

Identifying the specific cause of Loss of Smell requires consideration of your other symptoms, medical history, medications, and a physical examination. This page provides general guidance but cannot replace a proper medical assessment.

Is Loss of Smell serious?

Whether Loss of Smell is serious depends entirely on the underlying cause. In most cases Loss of Smell is caused by minor self-limiting conditions that resolve on their own. However certain accompanying symptoms should prompt prompt medical evaluation.

Loss of Smell is more likely to be serious if it is severe, sudden, progressive, or accompanied by other concerning symptoms. Age also matters — the same symptom can carry different implications in a young healthy adult compared to an older person or someone with existing health conditions.

What does Loss of Smell mean?

Loss of Smell is your body signalling that something is happening that warrants attention. It could mean something as simple as muscle tension or dehydration, or it could indicate an underlying medical condition that needs treatment. The meaning of Loss of Smell depends on its pattern, severity, duration, and accompanying symptoms.

How long does Loss of Smell last?

Days to weeks for viral causes potentially permanent for other causes. The duration of Loss of Smell varies significantly depending on the underlying cause. Symptoms caused by minor self-limiting conditions like viral infections typically resolve within days to weeks. Symptoms caused by chronic conditions may be ongoing and require long-term management.

If Loss of Smell persists beyond what you would normally expect for a minor illness, it is worth seeking medical assessment to identify any underlying cause.

How to treat Loss of Smell

Smell training treating underlying cause nasal steroids. The appropriate treatment for Loss of Smell depends entirely on the underlying cause, which is why medical assessment is important for persistent or unexplained symptoms.

Self-care measures can help manage many causes of Loss of Smell while awaiting medical assessment or for confirmed minor causes. However self-treatment should not replace medical evaluation for persistent, severe, or worsening symptoms.

Should I see a doctor about Loss of Smell?

You should see a doctor if Loss of Smell is severe, persistent for more than a few days without improvement, getting progressively worse, significantly affecting your daily life, or accompanied by any of the warning signs listed above.

For new unexplained symptoms particularly in adults over 50, medical assessment is generally recommended even if symptoms seem mild. Many conditions are much more easily treated when identified early.

• Keep a symptom diary noting when Loss of Smell occurs, how long it lasts, and what makes it better or worse — this information is invaluable for your doctor
• Note any other symptoms that occur alongside Loss of Smell even if they seem unrelated
• Make a list of all medications and supplements you take including over-the-counter products
• Think about recent changes — new medications, dietary changes, stress, travel, or exposure to illness
• Do not rely on internet searches alone for diagnosis — use this information to have a more informed conversation with your doctor
• If you are unsure whether your symptoms need urgent attention, call your local health advice line rather than waiting

This information is for educational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional for diagnosis and treatment of any medical condition. If you believe you have a medical emergency call your local emergency services immediately.