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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.
Green colouring under the skin strongly suggests solanine build-up in potatoes, although each process can occur without the other. A bitter taste in a potato is another – potentially more reliable – indicator of toxicity. Because of the bitter taste and appearance of such potatoes, solanine poisoning is rare outside conditions of food shortage.
Reflux episodes often occur at night and one may develop a bitter taste in the mouth. The throat can be severely irritated when acid touches the vocal cords and can lead to spasms of coughing. To prevent throat irritation from reflux, one should lose weight, stop smoking, avoid coffee beverages and sleep with the head elevated.
Local and systemic symptoms can appear immediately or several hours after consuming a meal prepared with the toxic wintered grain. Local symptoms include a bitter taste in the mouth, which leads to a complete loss of taste, tongue numbness or swelling, a burning sensation in the mouth, and pain when swallowing. If no more hazardous grain was ...
Dysgeusia (usually a bitter or metallic taste) is present in about 60% of people with BMS, a factor which led to the concept of a defect in sensory peripheral neural mechanisms. [12] Changes in the oral environment, such as changes in the composition of saliva, may induce neuropathy or interruption of nerve transduction.
Hypogeusia tied to oral cancer and tumors can affect sweet, sour, salty, and bitter tastes, but bitter taste hypogeusia occurs significantly more often compared to the rest of the tastes. Inhibition of gustatory papillae found in the base, often due to oropharyngeal tumors , is thought of to be the cause of this.
There is seldom nausea preceding the expulsion, and the undigested food lacks the bitter taste and odour of stomach acid and bile. [2] Symptoms can begin to manifest at any point from the ingestion of the meal to two hours thereafter. [3] However, the more common range is between thirty seconds and one hour after the completion of a meal. [4]
Another potential symptom is a metallic, acidic, salty or bitter taste in the mouth. [5] [8] The pseudomembranous type rarely causes any symptoms apart from possibly some discomfort or bad taste due to the presence of the membranes. [5] [6] Sometimes the patient describes the raised pseudomembranes as "blisters."