However, if the cause is unclear and lasts more than a few days, it’s best to see a healthcare provider to identify what is going on.
This article explains how your sense of taste works, what causes loss of taste, and treatment.
How Your Sense of Taste Works
Your sense of taste is related to two specialized cells: olfactory cells and gustatory cells. Olfactory cells are located high up in your nose. They connect to nerves that communicate with your brain. Gustatory cells are clustered in your mouth (particularly your tongue) and your throat.
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As you smell and chew your food, the aroma is generated. This activates your sense of smell, while the food mixed with saliva activates your taste senses.
It’s commonly assumed that different taste buds are located in different sections of the tongue. But that’s not entirely true. While different taste buds respond differently to the foods you eat, they are not clustered in separate areas of the tongue.
Five different taste buds scattered throughout your mouth and throat contribute to the overall taste of the food you eat. These taste groups are:
SweetSourBitterSaltyUmami
With five tastes differing in degree of intensity based on the taste buds, in combination with smell and “mouth feel” touch of consistency and temperature, taste experiences can vary greatly.
How Common Is Losing Your Sense of Taste?
Most people who visit their healthcare provider because they can’t taste anything actually end up with an issue with their sense of smell. Every year, there are about 200,000 healthcare provider visits with complaints of a loss of taste.
However, it is estimated that while not everyone seeks medical attention when they lose their sense of taste, about 15 out of 100 adults experience problems with this sense.
Why You Can’t Taste Anything (or Some Things)
The most common taste disorder is phantom taste perception, or phantogeusia. This is a sensation of a metallic or bitter taste in your mouth while there is not actually any food or scent to generate this sensation.
The other three taste disorders are:
Phantogeusia: Phantom taste perception Hypogeusia: Decreased ability to taste Dysgeusia: Confusing the different tastes Ageusia: Complete loss of taste (rare)
In addition to taste disorders, common causes of taste problems include:
Nerve or brain disorders (stroke, traumatic brain injury, brain tumors) Autoimmune diseases, such as lupus or Sjogren syndrome Strep throat, sinus problems, or nasal polyps Cigarette smoking Exposure to harmful chemicals, such as insecticides Dental problems, such as ill-fitting dentures Radiation therapy for head or neck cancer Allergies Hormonal changes Vitamin deficiency
Certain medications may also affect a person’s ability to taste, including:
AntibioticsAntihistaminesChemotherapy drugs
When to Seek Medical Attention
Any loss of taste that is not anticipated by your healthcare provider should be evaluated.
Our senses of smell and taste are important for our nutritional status, and individuals who lose these senses often lose weight. Our sense of smell can also warn us of danger, including smoke from a fire, chemicals, or a natural gas leak.
Diagnosing problems with taste or smell is generally uncomplicated. You should see an otolaryngologist (ENT) if you can’t taste anything. This healthcare provider, who specializes in ear, nose, and mouth disorders, will probably have you try to identify certain chemical odors using a standard “scratch and sniff” test, or flavors (a taste test).
Can Taste Loss Be Treated?
Losing your sense of taste or smell is only temporary, but sometimes it is permanent. For example, nasal polyps can be removed surgically, but lost cells cannot be replaced due to the normal aging process.
Permanent Loss:
Severe infections (like those that lead to Bell’s palsy)Stroke or head injury (most likely permanent)Chemical exposure or radiation
Treatable Loss:
Acute infections like strep throat after resolutionAllergies can be treated with antihistaminesSmoking, with loss of taste reversed if you quit
Medications that cause dry mouth can lead to a loss of taste. This is because saliva contains important chemical messengers for the brain to interpret tastes. In this case, you can discuss a medication change with your healthcare provider. You also can try chewing sugar-free gum and drinking a lot of water.
Malnutrition and depression can result from prolonged or untreated loss of taste. If the loss of taste is permanent, it is important to work with your medical team to minimize your nutritional or depression risks.
Summary
The loss of taste can occur for a variety of reasons, including a head injury, smoking, a temporary infection, or a chemical exposure. Because your sense of taste also relies on your sense of smell, conditions like nasal congestion may affect taste too.
In most cases, your loss of taste will be temporary and does not suggest a serious problem. If your sense of taste does not return, though, be sure to speak to your healthcare provider as this may point to a more significant or chronic underlying disease.
