Taste impairment means there is a problem with your sense of taste. Problems range from distorted taste to a complete loss of the sense of taste. A complete inability to taste is rare.
Loss of taste; Metallic taste; Dysgeusia
The tongue can detect only sweet, salty, sour, and bitter tastes. Much of what is perceived as "taste" is actually smell. People who have taste problems often have a smell disorder that can make it hard to identify a food's flavor. (Flavor is a combination of taste and smell.)
Taste problems can be caused by anything that interrupts the transfer of taste sensations to the brain, or by conditions that affect the way the brain interprets these sensations.
Does this change in taste affect the ability to eat normally?
Have you noticed any problems with your sense of smell?
Have you recently changed toothpaste or mouthwash?
How long has the taste problem lasted?
Have you been sick or injured recently?
What medicines do you take?
What other symptoms do you have? (For example, appetite loss or breathing problems?)
When is the last time you went to the dentist?
If the taste problem is due to allergies or sinusitis, the doctor may give you medicine to relieve the stuffy nose. If a medicine you are taking is to blame, your doctor may recommend that you change your dose or switch to a different drug.
A CT scan or MRI scan may be done to look at the sinuses or the part of the brain that controls the sense of smell.
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Finelli PF, Mair RG. Disturbances of smell and taste. In: Bradley WG, Daroff RB, Fenichel GM, Jankovic J, eds. Neurology in Clinical Practice. 5th ed. Philadelphia, PA: Butterworth-Heinemann; 2008:chap 19.
Travers JB, Travers SP, Christian JM. Physiology of the oral cavity. In: Cummings CW, Flint PW, Haughey BH, et al, eds. Otolaryngology: Head & Neck Surgery. 5th ed. Philadelphia, PA: Elsevier Mosby; 2010:chap 89.
Ashutosh Kacker, MD, BS, Associate Professor of Otolaryngology, Weill Cornell Medical College, and Associate Attending Otolaryngologist, New York-Presbyterian Hospital, New York, NY. Review provided by VeriMed Healthcare Network. Also reviewed by A.D.A.M. Health Solutions, Ebix, Inc., Editorial Team: David Zieve, MD, MHA, Bethanne Black, Stephanie Slon, and Nissi Wang.