Carotenemia
Turns out that eating too many carrots can overload your system with beta-carotene. If you have enough, your palms, soles, and ears may turn yellow. It won’t hurt you and it will fade gradually.
Most of the time, carotenemia only affects infants who overdo the pureed carrots. You would have to overdo carrots every day for months in order to turn yellow, so don’t let carotenemia stop you from eating all carrots.