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Dysgeusia, also known as parageusia, is a distortion of the sense of taste. Dysgeusia is also often associated with ageusia, which is the complete lack of taste, and hypogeusia, which is a decrease in taste sensitivity. [1] An alteration in taste or smell may be a secondary process in various disease states, or it may be the primary symptom.
A temporary loss of smell can be caused by a blocked nose or infection. In contrast, a permanent loss of smell may be caused by death of olfactory receptor neurons in the nose or by brain injury in which there is damage to the olfactory nerve or damage to brain areas that process smell (see olfactory system).
Diagnosing dysosmia precisely can be difficult due to the variety of causes and symptoms. Often, patients may be unsure whether or not they are having issues with smell or taste specifically. It is important to identify whether the distortion applies to an inhaled odorant or if an odor exists without the stimulus.
Anosmia is the inability to perceive odor, or in other words a lack of functioning olfaction.Many patients may experience unilateral or bilateral anosmia. A temporary loss of smell can be caused by a blocked nose or infection. In contrast, a permanent loss of smell may be caused by death of olfactory receptor neurons in the nose or by brain injury in which there is damage to the
When treating oral cancer and related tumors, there is no clear treatment for hypogeusia. Precautions need to be studied and taken to prevent hypogeusia and related symptoms from forming. However, if the treatments have led to the formation of hypogeusia, than patient specific nutrition plans may be used to treat the loss of taste. [5]
Ageusia (from negative prefix a-and Ancient Greek γεῦσις geûsis 'taste') is the loss of taste functions of the tongue, particularly the inability to detect sweetness, sourness, bitterness, saltiness, and umami (meaning 'savory taste'). It is sometimes confused with anosmia – a loss of the sense of smell.
[1] [2] Patients observe these symptoms and seek medical advice from healthcare professionals. Because most people are not diagnostically trained or knowledgeable, they typically describe their symptoms in layman's terms, rather than using specific medical terminology. This list is not exhaustive.
Hyposmia, or microsmia, [1] is a reduced ability to smell and to detect odors.A related condition is anosmia, in which no odors can be detected.Some of the causes of olfaction problems are allergies, nasal polyps, viral infections and head trauma.