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Just before and during your period, progesterone and estrogen levels 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.
Other things besides women's menstrual cycles that cause changes in hormone levels also may 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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