Does congestion cause loss of taste?

Taste buds detect basic tastes, while smell helps the brain recognise much of a food's flavour. When nasal swelling or mucus blocks airflow, foods may seem bland even though the tongue can still detect some tastes. A cold, COVID-19, allergies, sinus inflammation, medicines, and other conditions can affect smell or taste. The pattern and timing matter, so reduced taste does not point to one cause by itself.

Drink fluids and use saline nasal spray according to the label to ease mucus and dryness. Avoid inserting cotton buds or other objects into the nose. Choose foods with appealing textures and temperatures while your senses recover, and take care with hot food or spoiled items if smell is reduced. If infection is possible, follow current local guidance about staying home, testing, and protecting others.

Seek urgent help for breathing difficulty, facial swelling, severe headache, confusion, or signs of a serious allergic reaction. Arrange medical advice if loss of taste is sudden and unexplained, lasts after congestion clears, keeps worsening, or occurs with neurological symptoms. A clinician can consider infections, nasal problems, medicines, and persistent symptoms such as Long COVID.

Is my reduced taste likely linked to nasal blockage, smell loss, or another cause? Should I test for COVID-19? How long should I wait before arranging a review?