Prevalence of clinical manifestations

These are substances (histamine, heparin, serotonin, prostaglandins, leukotrienes) that cause the prevalence of clinical manifestations: abdominal pain and diarrhea in food allergies, pain and itching in contact dermatitis, itching eyes, nasal routes, sneezing, tearing the nose and dripping in hay fever, and breathing difficulties nell'asma, the anaphylactic reaction. Substances that can cause allergies and are lots of different kinds. Often it is pollen or mold spores or fungi (hay fever), or medicines. Especially in cases where the symptoms of a cold allergy (ie, with frequent sneezing and watery nasal secretion) occur throughout the year, the cause is usually to be found in some element of the home: for example, the hair of a pet or the dust mites at home, which are abundant in mattresses, pillows or in upholstery. Usually, a simple skin test can identify the allergen that causes the allergic reaction (see allergometria): if the patient has already produced IgE specific to an earlier contact with the allergen, the mast cells of the skin - leading to their mobile membrane IgE-specific quell'allergene - are stimulated to release their chemicals and in a few minutes, an acute allergic reaction localized, with the appearance of a vesicle red and itchy. The surest way to be free from the allergy is to avoid contact with the allergen, when it has been identified. If you are not acting in any contact that does not cause - or at least alleviate - the allergic reaction. You can use techniques such as desensitization to Besredka, or therapies iposensibilizzanti, then there are specific drug treatments for different clinical forms. 

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