Something went wrong, please try again later. Invalid email Something went wrong, please try again later. Never miss breaking news by signing up to our free email updates Something went wrong, please try again later. Never miss breaking news by signing up to our free email updates Doctors have issued an urgent warning over a dangerous TikTok trend that encourages teenagers to use cyanide to tackle acne. Experts are worried that the concerning trend – which has racked up millions of views – could be fatal. In one TikTok video, a young woman claims that she has been 'secretly' feeding…