Loss of taste after a fever

The tongue detects basic tastes, but much of a food's flavour comes from aromas reaching the nose. Congestion or inflammation after a respiratory illness can therefore make food seem bland even when the tongue still detects sweet, salty, sour, or bitter sensations.

COVID-19 can present with altered smell or taste, sometimes alongside fever, cough, sore throat, or fatigue. A common cold can also reduce flavour when the nose is blocked. Mouth dryness, oral thrush, dental problems, smoking, and certain medicines offer other explanations, so timing and accompanying symptoms matter.

Drink regularly and maintain gentle tooth, tongue, and gum cleaning. If your nose is congested, saline nasal spray or rinsing may help, provided you use a product and method suitable for you. Avoid putting harsh substances or undiluted essential oils in the nose or mouth.

Choose foods with varied texture and temperature, and check that food is fresh rather than relying on smell alone. Do not compensate by adding excessive salt or sugar. Follow current local guidance if you have symptoms of a contagious respiratory infection, and ask a pharmacist before using decongestants.

Get urgent help for breathing difficulty, blue or grey lips, severe confusion, fainting, a stiff neck with severe headache, new facial weakness, trouble speaking, or inability to swallow fluids. Urgency comes from these warning signs, not from loss of taste alone.

Arrange an appointment if taste loss persists after the other illness has settled, continues to worsen, affects eating or hydration, or comes with mouth pain, white patches, unexplained weight loss, recurrent fever, or a new medicine. A clinician may examine the mouth, nose, nerves, and medication list.

Describe whether smell is also reduced, which basic tastes you can detect, when the fever ended, and whether congestion or mouth changes remain. Ask if infection testing, a dental assessment, medication adjustment, or smell rehabilitation is relevant to your pattern.