It wasn’t until doctors took an X-ray of her chest that they were able to discover the truth.

“Basically I had a fungal infection or mould growing in my lungs,” Ms Ross said.

“I have permanent scarring in my lungs. If I breathe too hard or exercise too hard that will pull on the scarring and cause a lot of pain,” she said.

Australia’s mould crisis: X-ray shows spores growing on woman’s lungs | news.com.au — Australia’s leading news site

More than likely caused by wearing of masks.