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In some people, inhaling pollen causes their immune systems to overreact. The immune system sees the pollen as a danger and releases antibodies that attack the allergens. That leads to the release ...
People might also find that cross-reactivity occurs. [22] For example, people allergic to birch pollen may also find that they have an allergic reaction to the skin of apples or potatoes. [23] A clear sign of this is the occurrence of an itchy throat after eating an apple or sneezing when peeling potatoes or apples.
“This means you can ‘stack’ minor, otherwise inconsequential allergic reactions together with seasonal pollen and allergens that can cause an increase in allergy symptoms,” continues Dr ...
Even if a person has negative skin-prick, intradermal and blood tests for allergies, they may still have allergic rhinitis, from a local allergy in the nose. This is called local allergic rhinitis. [38] Many people who were previously diagnosed with nonallergic rhinitis may actually have local allergic rhinitis. [39]
They can be associated with bleeding from both nostrils and with a greater flow of blood into the mouth. [15] Sometimes blood flowing from other sources of bleeding passes through the nasal cavity and exits the nostrils. It is thus blood coming from the nose but is not a true nosebleed, that is, not truly originating from the nasal cavity.
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Allergens can be found in a variety of sources, such as dust mite excretion, pollen, pet dander, or even royal jelly. [2] Food allergies are not as common as food sensitivity, but some foods such as peanuts (a legume), nuts, seafood and shellfish are the cause of serious allergies in many people. [3]
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