Loss of taste and smell when it is not COVID-19

Smell contributes strongly to flavour, so swelling in the nose can make meals seem tasteless. A Common Cold, allergies, sinus inflammation, dry nasal passages, or irritation from smoke may interfere with airflow. Some medicines can also alter taste or smell; do not stop a prescribed medicine without advice.

A negative test does not identify every cause, and testing timing can affect interpretation. If the change started after an illness and persists, Long COVID may be considered only when there has been a relevant previous infection; a clinician should assess the full history.

Note the onset, whether one or both sides are affected, nasal symptoms, recent infections, and every medicine or supplement you use. Keep hydrated, avoid smoke, and use saline for congestion if suitable for you. Smell familiar items gently rather than repeatedly sniffing irritants. Keep food safety in mind when odour detection is reduced.

If COVID-19 remains plausible because of exposure or new respiratory symptoms, follow local testing and contact guidance. Persistent or unexplained change should be reviewed by a doctor, who may examine the nasal passages and mouth.

Get urgent help for breathing difficulty, chest pain, confusion, collapse, severe dehydration, or a sudden neurological change such as weakness or trouble speaking. Seek prompt advice for a one-sided blockage with bleeding, severe headache, swelling around the eye, or a symptom that keeps worsening. Book routine care when the change lasts beyond recovery or affects eating and safety.

Ask whether congestion, allergy, sinus disease, or a medicine fits your pattern; whether examination or testing is needed; and when persistent symptoms should be referred to an ear, nose, and throat specialist.