Jeremy Clarkson has raised concerns about his health after his TV co-star Kaleb Cooper pointed out an unusual change in his appearance.The 64-year-old, who has been managing Diddly Squat Farm for several years, returned from a trip to the South of France, only to have his farm manager remark that Clarkson looked like he might have vitiligo—a chronic autoimmune disorder that causes patches of skin to lose pigment.Fortunately, Clarkson doesn't suffer from the condition but did note that his days of sunbathing are long gone.