How common is loss of smell in Long COVID?

Long COVID-related smell change may vary from day to day and can affect enjoyment of food, appetite and confidence with cooking. Some people notice parosmia, where familiar smells seem unpleasant or different. Smell loss is one possible feature among many, and its presence does not establish Long COVID without considering the timing, earlier illness and other symptoms. A clinician can also consider unrelated nasal, neurological or medication-related causes.

Record which smells are missing or distorted and whether the change affects eating. Check expiry dates and food appearance instead of relying on smell, and test smoke and gas alarms. Smell training may be discussed with a clinician or therapist; it involves repeated, gentle attention to selected familiar scents over time. Avoid inserting irritants into the nose, and seek advice if altered smells reduce food intake.

Arrange an appointment when smell loss continues after the acute illness, affects nutrition or safety, or is accompanied by headaches, weakness, vision changes or other neurological symptoms. Seek urgent help for sudden neurological symptoms, severe breathing difficulty, chest pressure, new confusion or inability to stay awake.

Ask whether your symptom pattern fits post-infectious smell disturbance, whether the nose needs examination, and whether smell training is suitable. Tell the clinician about appetite, weight change, distorted smells, medicines and any difficulty detecting smoke, gas or spoiled food.