Article continues below advertisementZayn Malik shared a worrisome update with fans amid a mysterious prolonged hospital stay.The former One Direction band member revealed via his Instagram Story on Friday, April 17, that he was forced to cancel his upcoming shows as he "unexpectedly" still recovers from an undisclosed medical issue.Malik's post featured a photo of him in a hospital bed and gown, alongside text thanking the "incredible hospital staff" - including a cardiologist - for their help during a difficult time, insinuating his concerning health woes likely involve his heart.