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Just before and during your period, levels of progesterone and estrogen decrease. In some women, these hormone changes may worsen asthma. The relationship between hormones and asthma is complex, varies between individuals and isn't fully understood.
Along with women's menstrual cycles, other things that cause changes in hormone levels may also worsen or improve asthma symptoms. These include:
If you have bothersome asthma symptoms during your period, your doctor may recommend that you increase your asthma control medication or take a different medication before your period starts.
James T C Li, M.D., Ph.D.
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