I am a healthy 50 y.o. male. Active and in pretty good health (hockey 4 hrs per week). I spent a week swimming in the ocean (Hawaii) 2 months ago and noticed that all 10 toe nails turned orange. I had no trauma to my feet and there was no itching or pain. The colour returned to normal (orange pretty much the whole time I was there but they eventually returned to normal colour once home). Now, 2 months later, I was at a lake/cottage here in Ontario and I notice that all 10 toe nails have AGAIN turned orange?!? No trauma. No itchiness. No pain. My fingernails are normal in colour. What is causing this?