ALLERGIC DISEASES: ANGIO-OEDEMA
Angio-oedema (water retention) is characterised by puffiness and swelling of the tissues and deeper levels of skin. As small blood vessels enlarge in an allergic reaction, fluid escapes from them into the surrounding tissues and causes the swelling. This can be painful and give a burning sensation. The swelling is commonly found around the face, lips, tongue, eyes, and also in the hands, feet and legs. Occasionally, it can be dangerous if it causes blockage of the airways.
Angio-oedema often accompanies urticaria , like urticaria, it can be caused by false allergy reactions to foods and chemicals. Aspirin is a common trigger.
Asthma
If you have asthma, you may experience one or more of the following symptoms:
• wheezing
• shortness of breath
• cough
These symptoms can also be caused by other diseases, such as bronchitis or heart disease; asthma can be distinguished by measuring changes in the diameter of the airways of the lungs. Severe asthma is readily recognised, but mild asthma can go unidentified. Tightness of the chest, and shortness of breath are often accepted as normal, or go unperceived. A dry, persistent cough, especially in children, can often be a symptom of mild asthma. In a severe attack, a dry cough often becomes productive as phlegm is produced.
Asthma can occur immediately on meeting an allergen, or as a late phase reaction several hours later. Attacks are often bad late at night; this is linked to changes in the blood levels of a hormone, adrenalin.
Asthma is not always caused by an allergic reaction. It can be triggered by irritants, such as smoke or fumes. Cold air, exercise, or a viral infection can all cause asthma without allergy being involved. Stress, particularly emotional stress and anxiety, can also trigger or aggravate asthma.
Asthma can also be a symptom of food intolerance, chemical sensitivity, or of false allergy reactions to foods and chemicals.
*35\117\8*
Leave a comment
You must be logged in to post a comment.