Loss of smell due to COVID-19

COVID-19 may affect the smell pathway, so scents can disappear, seem weaker or smell unusually unpleasant. Taste may also seem reduced because smell contributes to flavour. Some people have nasal congestion, sore throat, cough, fever or tiredness, while others notice smell change as a prominent symptom. Loss of smell supports consideration of COVID-19 but does not confirm it, because colds, allergies and sinus disease can look similar. A clinician can interpret the symptom alongside your exposure, other symptoms and local testing advice.

Follow current local advice about testing, staying home and reducing contact when you have symptoms. Rest, drink enough fluid and choose foods that remain appealing through texture and temperature. Protect yourself from hazards: check smoke and gas alarms, and ask someone else to check food freshness if needed. Record when smell changed and whether scents are absent or distorted. Avoid strong irritants and do not use antibiotics unless prescribed. If the infection resolves but smell remains altered, arrange follow-up rather than repeatedly self-treating.

Get urgent medical help for difficulty breathing, chest pain, new confusion, inability to stay awake, blue or grey lips, or signs of serious dehydration. Contact a clinician if symptoms are worsening, you have medical conditions that increase your risk from infection, or smell does not begin to return after the acute illness. Seek prompt assessment for sudden smell loss after a head injury or with severe headache, weakness or vision changes.

Should I test or follow any current isolation advice? Could another nasal condition explain my symptoms? How can I protect food and smoke safety? When would follow-up or smell rehabilitation be appropriate?