Many people with asthma have a simple allergy to dust, house dust mites, pets or moulds. With allergy testing it is possible to identify specific triggers.
House dust mites thrive in a warm, humid environment such as modern, well insulated, centrally heated homes; their main habitat is bed mattresses, carpets and soft furnishings. We know that they die in very low or very high temperatures and where the humidity is low. Cooler, well ventilated homes discourage inhalant allergies. Some patients have made the observation that their asthma, previously thought to be a permanent or irreversible problem, actually clears within 48 hrs of arriving in any Mediterranean country or high in the mountains, where humidity is low, only to relapse on their return to the UK. This confirms that asthma can partly or totally be reversed if we could effectively control the quality of the air we breathe.
Contrary to popular belief, asthma is not always caused by allergens in the air. Some patients find that their symptoms get worse after eating certain foods or additives and get better when they leave them out of their diet for 1-2 weeks. On the basis of this observation, we can define an elimination & challenge process which aims to identify specific foods responsible for one's breathing problems. This kind of allergy is very different to peanut allergy, which is fast and potentially life threatening. It is called Type-B, delayed or masked allergy and is a common cause of breathing problems, characterised by congestion and or mucous production from the sinuses, nose, throat or the bronchial tree. Dairy products are top of the list for causing mucous secretions, mainly cow's milk protein, casein and lactalbumin, not lactose. Nasal polyps are frequently caused by inhalant allergy combined with food intolerance.
Identifying the root cause.
Skin prick tests and blood tests for allergy antibodies can accurately confirm inhalant allergens. If we suspect food intolerance we advise you to follow a simple elimination process. There is a good choice of safer foods to eat these days without getting hungry.
If this is not practical because of personal circumstances, we use intra-dermal tests or a combination of blood tests, to identify the culprit foods or food constituents.
The good thing about Type-B allergy is that, following avoidance of some high risk foods for a few weeks, the tolerance of the individual improves and the same items can be used again sparingly, without the same ill effects.