An allergy is a misdirected immune reaction to normally harmless substances, such as pollen, house dust mites, medicines and much more. It results in inflammatory reactions of the skin and mucous membranes, manifesting as allergic asthma, hay fever, eczema and exanthema.
To diagnose allergic diseases, we have various skin and blood tests at our disposal. Depending on the patient and the severity of the symptoms, therapy can be carried out either with medication or with so-called hyposensitisation therapy. Minuscule amounts of the allergen (e.g. pollen or house dust) are injected under the skin at fixed intervals. Continuously increasing the allergy dose causes the immune system to build up a tolerance to the administered substance.