The greening of my ex

Spent a day with my ex this Christmas season. Both his hands were now green so I asked, "what's the reason?" Was he painting, a project, and they didn't come clean? His pigment was tinted in a mossy green. I touched a hand, pulled the skin, gently pinched. He showed no pain, didn't even flinch. Could he be turning into the Grinch? He rolled up one pant leg and revealed a green knee and said, "well, it's really not bothering me". Attempting to hide my growing alarm, I said, "better see your doctor, some thing is wrong." A few days later he and his Doctor did meet. It turned out to be dye from new unwashed green sheets.