New York, April 22 -- Singer Zayn Malik has pulled out of scheduled public appearances, including 'The Tonight Show Starring Jimmy Fallon', as he continues to recover from an undisclosed medical condition, according to The Hollywood Reporter.

The development comes after Malik shared a health update on his Instagram account on Friday, posting a photograph from a hospital bed. He was seen wearing a hospital gown with medical tubes attached. Along with the picture, the singer expressed gratitude to fans and medical staff while confirming that he is still in recovery following a difficult week.

"To my fans - Thank you to all of you for your love & support now & always- been a long week and am still unexpectedly recovering," he wrote.

"Hear...