Allergies include hay fever, food allergies, atopic dermatitis, allergic asthma, and anaphylaxis. Symptoms may include red eyes, an itchy rash, sneezing, a runny nose, shortness of breath, or swelling. Common allergens include pollen and certain foods. Metals and other substances may also cause problems. Diagnosis is typically based on a person’s medical history. Risk factors include host, sex, race, and age.
About Allergy in brief
Allergies include hay fever, food allergies, atopic dermatitis, allergic asthma, and anaphylaxis. Symptoms may include red eyes, an itchy rash, sneezing, a runny nose, shortness of breath, or swelling. Common allergens include pollen and certain foods. Metals and other substances may also cause problems. Diagnosis is typically based on a person’s medical history. Early exposure to potential allergens may be protective. Treatments for allergies include the avoidance of known allergens and the use of medications such as steroids and antihistamines. In severe reactions injectable adrenaline is recommended. Allergies are common. In the developed world, about 20% of people are affected by allergic rhinitis, about 6% have at least one food allergy, and about 20%. Depending on the country about 1–18% ofPeople have asthma. Rates of many allergic diseases appear to be increasing. Risk factors include host, sex, race, and age, with the most significant factors being by far heredity and age. Four major environmental candidates are alterations in exposure to allergen diseases during early childhood, environmental pollution, and dietary changes. 90% of allergic reactions to foods can be caused by a wide variety of foods. Other food allergies affecting less than 1,000 people may be considered hydrolysis disorders, or hydrolyses. The word “allergy” was first used by Clemens von Pirquet in 1906. The most common type of allergic reaction is to dust or pollen, which can cause respiratory reactions, such as asthma and hay fever.
Allergen immunotherapy is useful for some types of allergies such as hay fever and reactions to insect bites, but its use in food allergies is unclear. The use of immunotherapy to treat food allergies can be considered to be less than 10,000 per cent of the population. The majority of food allergies are caused by infectious infectious diseases such as cow’s milk, wheat, peanuts, tree nuts, fish, shellfish, and shellfish. A person’s immune system reacts to these foods by reacting to them with histamine, which triggers an inflammatory reaction. This type of reaction can be triggered suddenly, or the onset can be delayed. Inhaled allergens can also lead to increased production of mucus in the lungs. Insect stings, food, antibiotics, and certain medicines may produce a systemic allergic response that is also called anAPHylaxis; multiple organ systems can be affected, including the digestive system, the respiratory system, and the circulatory system. Symptoms of food allergy include abdominal pain, bloating, vomiting, diarrhea, itchy skin, and swelling of the skin during hives. With insect stings a large local reaction may occur. It can last one to two days. This reaction may also occur after immunotherapy. The reaction can also be characteristic of hives and angioedema, in what is known as a ‘weal and flare’ reaction.
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This page is based on the article Allergy published in Wikipedia (as of Dec. 26, 2020) and was automatically summarized using artificial intelligence.
