Nepedia
Back to Discover
Advanced Reader
🧬

Hypogeusia

life science Maturity 11-13 Next article →

Hypogeusia is a medical term for a reduced ability to taste things. It is not the same as ageusia. Ageusia refers to a total loss of the sense of taste. In many scientific reviews, researchers group these two conditions together. This makes it difficult to know the exact prevalence of hypogeusia. We also do not clearly know the severity of taste loss in many studies. This happens because of a lack of stratification in current research. Understanding this condition is important for recognizing various health issues.

One major cause of hypogeusia is the COVID-19 virus. This virus affects the central nervous system and the peripheral nervous system. The peripheral nervous system consists of the nerves outside of the brain. Hypogeusia is a neurological disease and a peripheral nervous system symptom. It is actually the most common symptom in this category. It is closely followed by anosmia, which is a loss of smell. Often, hypogeusia appears alongside hyposmia, or a reduced sense of smell. These changes can be early indications of a COVID-19 infection.

Oral cancer and tumors can also lead to taste changes. These conditions can affect sweet, sour, salty, and bitter tastes. However, hypogeusia of bitter taste occurs much more often than others. This is often caused by the inhibition of gustatory papillae. These are the small structures found at the base of the tongue. Oropharyngeal tumors can cause this inhibition. Medical treatments for oral cancer are also frequent causes of taste loss. Up to 70% of oral cancer patients report experiencing dysgeusia. Dysgeusia is a different type of taste distortion.

Cancer treatments can damage the body's ability to taste in several ways. Chemotherapy and radiation therapy can impair or damage taste-related cells. Surgical treatments are another factor to consider. Depending on the severity of a tumor, surgery might remove parts of the tongue. This can range from minor to major removals. These physical changes directly impact the gustatory system.

Other nutritional and physical factors can trigger hypogeusia. A deficiency in zinc can cause various problems in the body. This lack of a specific mineral can lead to taste dysfunction. Chronic rhinosinusitis, or CRS, is another possible cause. CRS is a long-term sinus issue. It can cause problems with both smell and taste. Patients with CRS often show a noticeable presence of hypogeusia.

Parkinson's disease is also linked to changes in taste. The connection between Parkinson's and hypogeusia is not yet fully described. However, patients with this disease show dysregulation in their receptors. This includes both taste receptors and olfactory receptors. In most cases, the receptors affected are those used to perceive bitterness. This shows how neurological diseases can impact specific sensory perceptions.

Treating hypogeusia depends heavily on the underlying cause. For COVID-19, identifying hypogeusia can help doctors provide earlier treatment. There is currently no clear treatment for hypogeusia caused by oral cancer. Doctors must study precautions to prevent these symptoms from forming. If treatment has already caused taste loss, nutrition plans may help. Patient-specific nutrition plans can be used to manage the loss of taste.

Medical research is still searching for more answers. Zinc supplementation can treat some taste dysfunctions. However, there is little evidence for this in cases not caused by low zinc. We also do not have enough research on treatments for Parkinson's-related taste issues. Similarly, we know how to treat smell issues in CRS patients. We do not yet know how to treat the gustatory problems in those same patients. More study is needed to understand these complex connections.

595 words

Where will your curiosity go next?

Keep exploring at your chosen reading level.

More to explore

✨ What else?

Related topics you might enjoy

🔬 Go deeper

More advanced topics to explore

🪜 Step back

Simpler topics to build understanding

What is Nepedia?

A free, ad-free encyclopedia for children. Every article is written at five reading levels, so the same page works for a five-year-old and a fifteen-year-old — use the level switcher above to see this one change. No account needed to read.