Quick answer
What could loss of smell mean?
Loss of smell (anosmia) is the reduced or absent ability to smell, most often caused by colds, COVID-19 or sinus problems. It is usually temporary and improves as the infection clears. See a GP if your sense of smell has not returned after a few weeks.
Understanding loss of smell (anosmia)
Loss of smell, known medically as anosmia, affects how food tastes and can also affect your safety, because smell helps to warn you of hazards such as smoke or a gas leak. It most often develops after a viral infection such as a cold or COVID-19.
Causes of smell loss
Viral infections, sinusitis, nasal polyps and head injury can all cause a loss of smell. Neurological conditions are a less common cause.
Recovery and treatment for loss of smell
Treating any underlying nasal disease, such as sinusitis or polyps, helps the sense of smell to recover. Smell training — sniffing a set of distinct scents each day — may also help after viral smell loss, if it is advised for you.
When to see a GP about loss of smell
See a GP if your sense of smell does not return within a few weeks. You may be referred to a specialist if nasal polyps or chronic sinus disease are suspected.
Common questions about loss of smell
- Why do I lose my sense of smell when I have a cold?
- During a cold, congestion blocks odours from reaching the smell receptors in the nose. Your sense of smell usually improves as the congestion clears.
- Is loss of smell common after COVID-19?
- Yes, loss of smell is a common symptom of COVID-19. Most people recover their sense of smell within weeks to months, although some have longer-lasting symptoms.
- What is smell training and does it help?
- Smell training involves sniffing a set of distinct scents every day. It may aid recovery of the sense of smell after a viral infection.
- How can I stay safe if I have lost my sense of smell?
- Check use-by dates on food rather than relying on your sense of smell. Make sure your home has working smoke alarms and gas alarms.