Can fever cause loss of taste?

Fever itself does not usually cause loss of taste, but the infection causing the fever can affect taste indirectly. A blocked or runny nose can reduce the smells that normally combine with taste to create flavour. Some viral illnesses can also alter smell or taste more directly. If your temperature and taste change began together, consider the wider pattern of symptoms rather than treating fever as the sole cause.

Taste loss can mean food seems bland, or that familiar sweet, salty, sour, or bitter sensations are weaker. Often the main change is reduced smell: when the nose is congested, aromas cannot reach the smell receptors normally, so flavour fades even though the tongue still detects basic tastes. A common cold can cause this combination. COVID-19 can also involve a new change or loss of taste or smell, with or without a blocked nose. Taste changes that continue after the fever has settled deserve a clinical review, especially if smell is affected too.

Rest, drink fluids regularly, and monitor how you feel while the illness runs its course. If you have congestion, saline nasal rinsing or spray may help you breathe more comfortably when used as directed. Avoid smoking and strong chemical fumes, which can irritate the nose and dull smell. Keep food safe by checking dates and asking someone else to assess freshness if your sense of smell is reduced. Follow current local advice about testing or limiting close contact if COVID-19 is possible. Do not start antibiotics solely because you have fever and taste loss; they do not treat viral infections.

Seek urgent help for trouble breathing, chest pain, new confusion, fainting, severe weakness, or difficulty staying awake. Arrange medical advice if you cannot keep fluids down, signs of dehydration appear, the fever is worsening or not settling, or you are concerned because of pregnancy, an older age, a weakened immune system, or a long-term medical condition. Contact a clinician if taste or smell remains changed after the acute illness, keeps returning, or is accompanied by facial pain, a severe headache, or neurological symptoms.

You could ask: Could congestion or a recent viral illness explain my taste change? Should I test for COVID-19 based on my symptoms and local guidance? How long should I monitor the change before arranging a review? Are any medicines I take known to affect taste or smell? What warning signs should prompt urgent care?