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Hypersensitivity (also called hypersensitivity reaction or intolerance) is an abnormal physiological condition in which there is an undesirable and adverse immune response to an antigen.
Dust mite allergy, also known as house dust allergy, is a sensitization and allergic reaction to the droppings of house dust mites. The allergy is common [ 38 ] [ 39 ] and can trigger allergic reactions such as asthma, eczema , or itching .
SAC is the most common ocular allergy. [1] [8] Symptoms of the aforementioned ocular diseases include itching and pink to reddish eye(s). [2] These two eye conditions are mediated by mast cells. [2] [8] Nonspecific measures to ameliorate symptoms include cold compresses, eyewashes with tear substitutes, and avoidance of allergens. [2]
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Allergy testing may reveal the specific allergens to which an individual is sensitive. Skin testing is the most common method of allergy testing. [39] [failed verification] This may include a patch test to determine if a particular substance is causing the rhinitis, or an intradermal, scratch, or other test. Less commonly, the suspected ...
An allergic shiner is a dark discoloration below the eye that is associated with allergic rhinitis and is often seen in conjunction with bilateral Dennie–Morgan folds. These shiners are caused by venous congestion within the infraorbital groove , particularly from the nose .
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