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Other Specific Conditions > Asthma > What Causes Asthma?

What Causes Asthma?


The cause of asthma is not known. Some develop asthma as young children; others develop it later in life.  The reason is still unclear.


Research shows some indication that family history, obesity, viruses, or exposure to tobacco smoke, cockroaches or dust mites as a child might lead one to develop asthma.  The cause of asthma, however, has still not been proven.