Types of Asthma
The Seasonal Type - If the patient's asthma always returns with a certain season of the year, it is obviously due to something that he smells or eats at that time alone. The usual and very common cause is the grass pollen. Patients may have pure asthma from this cause without the usual symptoms of hay fever, though such an occurrence is rare.
The Locality Type - Patients have been known to lose their asthma by going to live on the opposite side of a road or even by sleeping in a different room in their own home. Many of these cases are explained by the fact that an animal has been left behind, or some ivy or creeper avoided that previously gave rise to asthma symptoms. Many complain that they cannot stand the sea.
The Periodic Type - A few cases seem to show an extraordinarily regular periodicity of onset. Every fourteen or fifteen days an attack comes, without any regard to specific days of the week. It seems as though such cases are desensitised by an attack; when the desensitisation has gradually worked off, they again become sensitive and have another attack.
The Menstrual Type - Many patients date the commencement of their asthma from the time of puberty, and many women have exacerbations of asthma at the menstrual periods regularly throughout their life. As in many other menstrual disturbances, this may be during the week before the period commencement or during its flow. This opens up the question of the endocrine glands and their influence in asthma and its allied complaints.
The Occupation Type - This type merely consists of those patients who are sensitive to proteins they meet with at their work. Many are also examples of cases, which become sensitive only after very long years of work at one particular occupation. Such patients could be poultry keepers, farmers, and bakers.
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