So your feet can affect your lungs?
This is actually an old notion and data continue to gather to suggest that it may be true. The thought process is that molds grow under the toenails and the body develops an allergy to them The same mold may colonize the airways and the allergy response there leads to asthma. We see the same process in the well recognized diseases Allergic Bronchopulmonary Aspergillosis and Allergic Bronchopulmonary Mycosis.
The fungus that grows under the toenails is called trichophyton (try-co-FY-ton). A recent study from Japan published in the Journal, Chest, showed that asthmatics with allergy to trichophyton were much more likely to have severe disease than asthmatics without trichophyton sensitivity. Older studies have suggested that severe asthmatics with trichophyton sensitivity derive benefit from antifungal treatment.
If you have asthma that is not responding to the usual treatment, it may be time to take a look at your feet.