Itch and scratch, itch and scratch. It's not the most serious physical problem in our lives, but it is common and it is very annoying. Now, researchers at the Hebrew University of Jerusalem and in Boston ...
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(Medical Xpress) -- If you're one of the millions of people coughing, sneezing, sputtering, and cursing your body's hypersensitivity to ragweed, trees, and grass this spring, researchers at Yale have what ...
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A pandemic of ailments called the "allergic march" -- the gradual acquisition of overlapping allergic diseases that commonly begins in early childhood -- has frustrated both parents and physicians. For the ...
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The extent to which our development is affected by nature or nurture – our genetic make-up or our environment – may differ depending on where we live, according to new research.
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(Medical Xpress) -- Previous human studies have suggested that early life exposure to microbes (i.e., germs) is an important determinant of adulthood sensitivity to allergic and autoimmune diseases such as hay fever, asthma ...
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(Medical Xpress) -- Researchers from Children of the 90s at the University of Bristol, in collaboration with 22 other studies from across the world, have discovered three new genetic variants associated with ...
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Children born outside the United States have a lower risk of asthma, skin and food allergies, and living in the United States for a decade may raise a person's allergy risk, said a study on Monday.
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(HealthDay)—The spring allergy season is off to an early start and allergy sufferers need to take action to prevent symptoms, an expert says.
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The best-selling wrinkle erasing drug Botox will be used in an Australian study to treat hay fever, researchers said Tuesday after it showed promise in providing relief in early trials.
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Parents are reporting more skin and food allergies in their children, a big U.S. government survey found. Experts aren't sure what's behind the increase. Could it be that children are growing up in households so clean that ...
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A synthetic, anti-inflammatory and anti-allergic family of drugs to combat a variety of illnesses while avoiding detrimental side effects has been developed by a Hebrew University of Jerusalem researcher.
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(Medical Xpress)—A new study from the University of Alberta shows that your genes could be the reason your allergic asthma or hay fever is so severe.
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(HealthDay)—Many parents complain that as soon as school starts, their child inevitably catches a cold. But, while kids do swap their fair share of germs during the school day, not every runny nose stems ...
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Eating low-fat yoghurt whilst pregnant can increase the risk of your child developing asthma and allergic rhinitis (hay fever), according to recent findings.
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Patients with chronic obstructive pulmonary disease (COPD) who also have allergic disease have higher levels of respiratory symptoms and are at higher risk for COPD exacerbations, according to a new study from researchers ...
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Allergic rhinitis is an allergic inflammation of the nasal airways. It occurs when an allergen, such as pollen, dust or animal dander (particles of shed skin and hair) is inhaled by an individual with a sensitized immune system. In such individuals, the allergen triggers the production of the antibody immunoglobulin E (IgE), which binds to mast cells and basophils containing histamine. When caused by pollens of any plants, it is called "pollinosis", and if specifically caused by grass pollens, it is known as "hay fever". Ironically, in hay fever, there is neither any fever nor any hay, but since grasses shed their pollens into the air, at about the same time that hay is being cut, the common term hay fever is used.
IgE bound to mast cells are stimulated by pollen and dust, causing the release of inflammatory mediators such as histamine (and other chemicals). This usually causes sneezing, itchy and watery eyes, swelling and inflammation of the nasal passages, and an increase in mucus production. Symptoms vary in severity between individuals. Very sensitive individuals can experience hives or other rashes. Particulate matter in polluted air, and chemicals such as chlorine and detergents, which can normally be tolerated, can greatly aggravate allergic rhinitis. The physician John Bostock first described hay fever in 1819 as a disease.
Allergies are common. Heredity and environmental exposures may contribute to a predisposition to allergies. It is roughly estimated that one in three people have an active allergy at any given time and at least three in four people develop an allergic reaction at least once in their lives. In Western countries between 10–25% of people annually are affected by allergic rhinitis.
This text uses material from Wikipedia licensed under CC BY-SA
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