Our immune system provides protection from bacteria and viruses. When our body meets harmful substances, we produce immunoglobulin E (IgE) antibodies, which then cause the release of chemicals like histamine, causing swelling and inflammation. In people with allergy and asthma, the immune system not only reacts to fights against bacteria and viruses, but also against harmless substances such as pollen, cat hair or dust in a person’s nose, lungs, eyes, and under their skin. This can lead to symptoms as itchy eyes, runny nose and sneezing as the body tries to eliminate the allergen.
Asthma is a condition in which a person’s airways narrow and swell and produce extra mucus which makes breathing and trigger coughing, wheezing and shortness of breath, difficult. Asthma as such cannot be cured, but its symptoms can be controlled.
Allergies and asthma often occur together. The same substances that trigger hay fever symptoms may also cause asthma signs and symptoms. In some cases, skin or food allergies can cause asthma symptoms. These are known as allergic asthma or allergy-induced asthma.
Asthma and allergy numbers in Europe and beyond are alarming: