The complete loss of smell — anosmia — can be temporary or permanent, depending on the cause. Loss of smell caused by a common cold will clear up on its own. Loss of smell related to an obstruction of the nasal passage, such as polyps, will clear up when the obstruction is removed. Loss of smell related to other causes, such as aging or a brain tumor, may be permanent.
Anosmia isn't necessarily a serious condition in and of itself, but an intact sense of smell is necessary to fully taste foods. So loss of smell could cause you to lose interest in eating, leading to weight loss, malnutrition or even depression. Loss of smell also prevents you from smelling things like spoiled food or smoke.
CAUSES
Acute sinusitis (sinus infection)Loss of smell due to problems with the inner lining of your nose
Anosmia can be caused by temporary or permanent irritation, or destruction of the mucus membranes lining the inside of your nose. This can be caused by:
- Hay fever
- Common cold
- Influenza (flu)
- Nonallergic rhinitis
Loss of smell caused by colds, allergies or sinus infections usually clears up on its own after a few days. If this doesn't happen, consult your doctor so that he or she can rule out more-serious conditions.
Loss of smell can sometimes be treated, depending on the cause. Your doctor can give you an antibiotic to treat a bacterial infection, or remove obstructions that are blocking your nasal passage.
In other cases, anosmia can be permanent. In particular, if you're over age 60 you're more likely to lose your sense of smell.
If your loss of smell is permanent, talk with your doctor about strategies to ensure your safety, such as having someone else smell leftover food to make sure it hasn't gone bad, and installing smoke and gas detectors in your home.
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