Asthma
Brittle asthma
There are also a very small number of people with difficult to
control asthma whose asthma is referred to as "brittle asthma". Brittle
asthma is unstable and unpredictable, with frequent severe attacks.
Often no consistent trigger factors can be identified. There are two
types:
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Type I: Peak flow varies persistently day and night despite
considerable medical therapy. More women than men are affected.
Possible trigger factors include allergens (for example house-dust
mite, pollen, cat and dog dander), life trauma or ongoing stressful
situations, and symptoms related to the menstrual cycle.
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Type II: Attacks come on very quickly without warning and often
require emergency hospital admission. Between attacks people with Type
II Brittle asthma can feel well and their asthma seems well controlled.
It is equally common in both men and women. Possible trigger factors
include inhalation of something that causes an allergic reaction. In
some people foods can be triggers for serious attacks.
What are the symptoms?
| What are the causes? 
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