Immunotherapy, more commonly known as “allergy shots”, can reduce body’s sensitivity to allergens, such as dust mites, pollens and pet dander. In this way, it can prevent aggravations of asthma symptoms, such as coughing, wheezing and shortness of breath, that are caused by exposure to allergens.

So, how does Immunotherapy work? It “desensitizes” the body against allergens by injecting tiny amounts of these very allergens under the skin on a regular basis. With regular exposure, the body begins to become less sensitive to these allergens. Asthma symptoms start reducing, and this in turn prevents the possibility of an asthma attack.

Allergy shots are usually given every 2 to 4 weeks, though people, who are mildly sensitive to allergens, may take them on a yearly basis. The entire immunotherapy process lasts for 2 to 5 years, by which allergy symptoms reduce considerably or disappear entirely.

Allergy shots are usually given in the upper arm. Any form of vigorous physical activity can increase the rate of flow of blood to the body tissues, which, in turn, will lead to rapid release of antigens into the blood. This can lead to sudden exacerbations of asthma symptoms or even asthma attack. Thus one must avoid exercising for at least two hours before and after the immunotherapy.