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Hay fever and allergic rhinitis

Source: www.bupa.com.hk
Topic: Hay Fever
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Sort Desciption: Hay fever is one of the most common allergic conditions. Most people who suffer from hay fever are under 40, and the condition gradually decreases with age. There are practical things you can do to avoid unnecessary exposure to pollens. ...

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Introduction. Hay fever is one of the most common allergic conditions. Most people who suffer from hay fever are under 40, and the condition gradually decreases with age. There are practical things you can do to avoid unnecessary exposure to pollens. And there are many treatment options available, including tablets, nose drops and sprays, and eye drops. Some people become sensitive to substances they come into contact with (allergens) and suffer symptoms like wheezing, sneezing and itchy eyes. Allergens such as grass and tree pollens are only around for short periods and produce seasonal symptoms (hay fever). Others such as house dust mite never disappear, and produce year-round (perennial) symptoms. Hay fever, asthma and eczema are all related allergy-based conditions and the tendency to develop them runs in families. People with hay fever often have a close relative with one or other of these conditions. When someone with hay fever comes into contact with allergens, their body produces increased amounts of immunoglobulin E (IgE), a type of antibody. IgE binds to certain cells throughout the body and activates them to release the chemical histamine. This chemical is responsible for the symptoms of sneezing, stuffy nose (rhinitis) and itchy eyes and throat. Most people suffer only a few weeks of mild discomfort, but for an unlucky few, the symptoms can be severe and last for months. Hay fever can make asthma worse, and some people who are not usually asthmatic may become wheezy. Most people with hay fever are allergic to grass and oilseed rape pollens, which appear from April to August each year. People who are sensitive to pollen from the trees hazel, yew, elm and alder may develop symptoms from January to April, and people with nettle allergy symptoms can be affected from April to mid-September. Allergic rhinitis If you have symptoms like those of hay fever but you have them after the hay fever season ...

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