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Oral allergy syndrome (OAS) or pollen-food allergy syndrome (PFAS) is a type of allergy classified by a cluster of allergic reactions in the mouth and throat in response to eating certain (usually fresh) fruits, nuts, and vegetables. It typically develops in adults with hay fever. [1] It is not usually serious. [2]
Burning mouth syndrome (BMS) is a burning, tingling or scalding sensation in the mouth, lasting for at least four to six months, with no underlying known dental or medical cause. [ 3 ] [ 7 ] No related signs of disease are found in the mouth. [ 3 ]
Hypoesthesia or numbness is a common side effect of various medical conditions that manifests as a reduced sense of touch or sensation, or a partial loss of sensitivity to sensory stimuli. In everyday speech this is generally referred to as numbness.
Acid reflux into the mouth can cause breakdown of the enamel, especially on the inside surface of the teeth. A dry mouth, acid or burning sensation in the mouth, bad breath and redness of the palate may occur. [27] Less common symptoms of GERD include difficulty in swallowing, water brash, chronic cough, hoarse voice, nausea and vomiting. [26]
In a reflex arc, a series of physiological steps occur very rapidly to produce a reflex.Generally, a sensory receptor receives an environmental stimulus, in this case from objects reaching nerves in the back of the throat, and sends a message via an afferent nerve to the central nervous system (CNS).
It is caused by a cold substance touching the roof of the mouth, and is believed to result from a nerve response causing rapid constriction and swelling of blood vessels, [3] "referring" pain from the roof of the mouth to the head. [4] [5] The rate of intake for cold foods has been studied as a contributing factor.
Primary symptoms are dryness (dry mouth and dry eyes [2]), pain and fatigue. [15] Other symptoms can include dry skin, vaginal dryness, a chronic cough, numbness in the arms and legs, feeling tired, muscle and joint pains, and thyroid problems. [4] Those affected are also at an increased risk (15%) of lymphoma. [2] [7]
Astringency, the dry, puckering or numbing mouthfeel caused by the tannins [1] [2] in unripe fruits, lets the fruit mature by deterring eating. Tannins, being a kind of polyphenol , bind salivary proteins and make them precipitate and aggregate , [ 3 ] [ 4 ] [ 5 ] producing a rough, "sandpapery", or dry sensation in the mouth.