Parosmia is where smells appear distorted, often unpleasant. It is not a permanent or harmful condition, but distorted smell can be difficult to live with, affecting eating, relationships and mood.

Parosmia is the term used for an abnormality or distortion of smell. It is commonly experienced by people recovering their sense of smell following loss from a virus or injury, and appears to be a normal part of the recovery process for most people.

The condition is not harmful in itself and is usually temporary, though it can continue for many weeks or months.

The symptoms can seriously affect eating patterns as people try to avoid foods that trigger foul smells. They can also affect relationships and lead to low mood or depression. The information and links on this page are here to help.

What causes parosmia?

Research suggests the condition is triggered by certain odour molecules when they reach the receptors in the nose. Studies have so far identified two types of molecules, one containing sulphur and one containing nitrogen, as the main triggers. These molecules are found in a wide range of common foods.

Scientists do not yet fully understand which odour receptors these molecules link to, or why they have such a powerful effect on recovering olfactory neurons. Research is ongoing.

There is no medication for parosmia. Smell training is shown to be helpful in supporting recovery, but it does not cure distorted smell.