Allergy is an altered and hypersensitive reaction of the immune system to foreign substances from the environment that are not otherwise harmful and harmless to most people.It is important to understand that allergy is not a disease in itself, but its mechanisms lead to various diseases. In clinical practice, manifestations of allergies can be seen as Anaphylaxis, Urticaria, Angioedema, Allergic rhinoconjunctivitis, allergic asthma, serum sickness, allergic vasculitis, hypersensitivity pneumonitis, atopic dermatitis (eczema), skin irritation and granulomatosis.It is important to note that allergic reactions very often begin after the first 3 months of life, but almost never from birth, although they have a strong genetic background. An allergic reaction can occur immediately or a few hours after contact with a specific allergen.Allergens can be divided into:inhalation (allergens we inhale), nutritional (allergens that enter the body as food or drink) medicines that can be applied as drops, creams and sprays on the skin and mucous membranes, capsules, tablets, syrups, drops, suppositories, vaginal tablets or can be applied in the form of injections and infusions. SYMPTOMS OF AN ALLERGIC REACTION AND WHEN THEY OCCUR The symptoms of an allergic reaction depend on how the allergen enters the body. For example, pollen inhaled through the nose usually causes symptoms in the nose, eyes, sinuses and throat. Everyone knows the reaction to pollen is allergic rhinitis, or pollen fever. On the other hand, food allergies cause problems in the stomach and intestines. Allergic reactions often occur simultaneously on different parts of the body. Allergy symptoms can range from mild to severe and life-threatening.They can be divided depending on which organs are affected, they are:Skin: hives, eczema and facial swelling. Respiratory tract: nose (pollen fever), throat (swelling), lungs (cough, shortness of breath, bronchospasm). Gastrointestinal system: nausea, vomiting, abdominal pain, diarrhea. Cardio-neural system: feeling of weakness, weakness, paleness, fainting. FOOD ALLERGY They are more common in children than in adults. They are more common in people who have a genetic predisposition to develop allergic reactions. People with food allergies are more likely to suffer from asthma and other allergies.INSECT INJECTION ALLERGY When we are stung by insects, their venom and other toxins reach our skin. Mild edema, itching or pain at the site of the sting is normal. However, an allergic reaction to insect bites occurs when toxins reach our skin, and the immune system responds excessively and inadequately to them.POLLEN ALLERGY It is a seasonal allergy and occurs exclusively during the flowering period of certain plants (ragweed, grass, trees). It is also called pollen sneeze. It usually starts in March and can last until the end of October.ALLERGY TO HOUSE DUST Clean your home as much as possible and throw out or avoid objects that collect dust on themselves. Dust consists of several substances such as mites, mold spores, animal hair. It is very likely that you may be allergic to any of the above.HOW IS ALLERGY TREATED? In many cases, the most effective way to avoid allergies is to avoid the allergen that causes the reaction, whenever possible. For example, if you have a food allergy, you should check the product declaration of food allergens before eating.There are also several medications available to help control the symptoms of an allergic reaction.ALLERGIC ASTHMA Allergic asthma is the most common form of asthma and over 50% of asthmatics suffer from an allergic reaction. The symptoms of allergic and any other asthma are the same, and they occur after inhaling a certain allergen. The most common allergens that cause asthma are pollen, grass, weeds, dust and food. Allergic asthma is often associated with other allergic diseases, primarily allergic sneezing, allergic conjunctivitis and atopic dermatitis.HOW IS ASTHMA TREATED? Treatment of allergic asthma includes, avoiding allergens, physical activity, recognizing and treating associated diseases (most often allergic sneezing and reflux of gastric contents) and the use of asthma medications, syrups, asthma inhalers, asthma pumps.ALLERGY IN CHILDREN From year to year, an increasing number of children suffer from some form of allergy. Allergy is an overemphasized reaction of the organism (immune system) to substances from our environment, which are essentially not a threat and to which most people do not react.Allergic reactions are manifested on the skin, respiratory tract, but also in the digestive tract. How the allergy will manifest depends on the allergen itself and the way it is taken into the body.SYMPTOMS OF ALLERGY IN CHILDREN Symptoms range from very mild to severe, even life-threatening (anaphylactic shock). One of the most common symptoms of allergies in children is atopic dermatitis or eczema - a reddish rash that occurs on the skin, often with itching. Symptoms caused by food-derived allergens can also be pain in the s