The 25-year-old, who posted poor results in the opening two rounds of this season's World Cup in Ostersund and Hochfilzen, took time out from competing last week.
And after tests, it has been confirmed that she is suffering from the respiratory ailment.
“I still have some samples that I have not received an answer to yet, but yesterday I learned after two tests that I have stress asthma," she said on her official website.
"Not fun to get the news, but there is treatment available so it was super important that I have found out about it.
- Sports & Recreation