Ant McPartlin has arthritis in his thumb.
The 38-year-old TV presenter - one half of Ant and Dec - has developed the medical condition, which causes inflammation in the joints, just months after accidentally slicing off part of his thumb with a vegetable slicer in February.
Describing his injury as a "nasty old thing to see", he added to The Sun newspaper: "I know that I'm going to sound like a nan, but I've got to keep it out of the rain. The rain messes with it and it gets really stiff. I've got arthritis. I can't go giving thumbs up willy-nilly."
The Geordie star, who scooped up two BAFTAs with Declan Donnelly at the British Academy Television Awards on Sunday (18.05.14), also spoke for the first time about his attack at the hands of a group of young hooligans in March.
Ant and his mum were left shaken up after he asked the yobs to stop filming him on camera-phones as they enjoyed a quiet meal at a pub in Chiswick, West London.
He told the Daily Mirror newspaper: "It's not going to stop me going out for a pint. These sort of things happen once in a blue moon."
Tagged in Ant And Dec Declan Donnelly Ant McPartlin