India, Dec. 22 -- Anok Yai is opening up about her congenital lung defect diagnosis. The 28-year-old supermodel took to Instagram on Friday to reveal her health scare, sharing photos and videos of her getting treatment at a hospital. In her lengthy caption, she explained how she has been "dealing with this silent battle" for the past year.

In the carousel of videos, Yai is seen on a hospital bed as she fights the defect that is "overworking my heart and slowly destroying my lungs." She revealed that it "started as something asymptomatic for the majority of my life turned into a lingering cough, which turned to chest pains, bouts of coughing up blood, then at times struggling to breathe."

Despite her health issues, Yai continued to work,...