Why does COVID-19 cause loss of taste?

Much of what people call taste is actually flavour, which depends on smell. Viral inflammation in the nose can interfere with odours reaching the smell receptors. COVID-19 may also affect the nerve pathways involved in smell, so familiar foods may seem muted, metallic, salty, or unlike themselves. Loss of Taste is a very common presentation of COVID-19, but loss of taste also has other possible causes, including nasal congestion and some medicines.

Follow current local public-health advice if you may have COVID-19. Keep drinking fluids and choose foods with varied texture and temperature if meals feel unappealing. Check food labels and expiry dates rather than relying on smell alone. Do not add large amounts of salt or sugar to make food more noticeable. Gentle oral hygiene can improve mouth comfort, but avoid nasal products or supplements unless a clinician advises them.

Seek urgent care for new trouble breathing, persistent chest pressure, confusion, fainting, or difficulty staying awake. Arrange a clinical review if taste loss continues after other symptoms settle, is affecting eating or drinking, or comes with facial weakness, severe headache, or new neurological symptoms.

Ask whether your nasal symptoms, medicines, or another condition could be contributing, and whether an examination of your nose, mouth, and nerves is appropriate. Mention changes in appetite, weight, hydration, smell, or safety concerns around spoiled food and smoke detection.