Loss of taste with influenza: what to know

During influenza, fever, tiredness, a blocked nose and less fluid intake can reduce the flavour detected during eating. Smell contributes heavily to flavour, so nasal swelling may feel like a tongue problem. Coughing, mouth breathing and dehydration can also leave the mouth dry.

Loss of taste is not specific to influenza. A common cold and COVID-19 can produce overlapping upper-airway symptoms, while Long COVID may involve taste changes that continue after the initial infection. The timing of the sensory change, fever, cough, congestion and exposure history helps a clinician interpret it.

Rest, take suitable fluids regularly and choose soft, nourishing foods that are easy to tolerate. Keep the mouth clean and avoid smoking. Follow prescribed influenza treatment instructions and check with a pharmacist before adding over-the-counter products, especially if other medicines or chronic conditions are present.

Stay alert to hydration by noticing thirst, dry mouth, urine changes and dizziness. If appetite remains low, small frequent meals may be easier than a large plate. Taste often improves as congestion and the illness settle, but record symptoms if the change continues.

Contact a clinician if taste does not begin to improve as the influenza symptoms settle, or if fever returns, breathing becomes harder, weakness is marked, fluids cannot be kept down, or eating falls substantially. Seek urgent help for severe breathing difficulty, new confusion, blue or grey lips, or sudden neurological changes.

Ask whether the illness pattern fits influenza or another infection, whether testing is useful, how to manage medicines safely, and what follow-up is needed if taste or smell remains changed.