What actually happens to your body on the top of Mt Everest - as Australian teen goes viral while struggling to breathe in ‘Death Zone’

She set out to conquer the world’s highest peak — and nearly didn’t make it back.

Bianca Adler was left gasping for air after spending nearly four days in Mount Everest’s notorious “Death Zone,” an icy, treacherous stretch so high up, there’s barely enough oxygen to survive for even short periods of time.

“I feel horrible,” the 17-year-old Australian croaked in a now-viral TikTok, her face battered by wind and cold, lips cracked and voice barely a whisper. “My neck, my throat, my lungs.”

The teenage mountaineer had spent days battling some of the planet’s harshest terrain to reach a staggering 27,723 ft — just 1312.34 ft shy of the summit — before she was forced to turn back amid fierce winds and the onset of frostbite.

Adler had made the climb with her father, but he’d tapped out earl