High doses of Canthaxathin, an algae-derrived pigment which gives flaminfos their unique pink color, is sold in some health food stores in pill form to create artificial tans and, in some people, can appear something like the photo.... I also once worked with a health-nut who drank so much carrot juice that she literally turned orange and stayed that way for several days...
Who knows...
Can also be caused by several types of anti-depression medicine.