Symptom

Loss of smell

Loss or reduction of the sense of smell means that familiar scents become harder to detect or are no longer perceived at all. The symptom can appear suddenly, for example after a cold, another viral infection, or a head injury. Long-term nasal and sinus inflammation, nasal polyps, aging, and certain neurological diseases can also cause smell disturbances. In Finland, the most common causes are respiratory infections and sinus problems.

Reduced sense of smell can significantly affect the sense of taste and the enjoyment of eating, because much of tasting depends on recognizing smells. Sometimes a person may think their sense of taste has weakened, when in reality the issue is a change in smell. Loss of smell is especially concerning if it is accompanied by other sudden symptoms, such as a severe headache, facial numbness, or visual disturbances, or if the sensory change lasts longer than a few weeks. In these cases, it is important to seek assessment by a healthcare professional. In some cases, smell training may be tried to help restore the sense of smell.

Practitioners – Loss of smell

Frequently asked questions

Can a cold cause loss of smell?

Yes, a common respiratory infection such as a cold can temporarily reduce the sense of smell. If the symptom lasts a long time, seek professional assessment.

Why does food taste like nothing even though there is nothing wrong with the tongue?

Many taste sensations are produced through the sense of smell. Reduced smell can make it seem like food has no taste. Contact a healthcare professional if you are concerned.

Can smell return on its own?

In some cases, the sense of smell can return over time, especially after an infection. If the symptom continues, discuss it with a professional.

When does loss of smell require a doctor’s examination?

If the change in smell is sudden, lasts more than a couple of weeks, or is linked to other symptoms, seek medical care.