I have had eczema all my life. I get it really, really badly if I don't do something about it -- I used to get green (!) infected patches behind my knees as a kid, and I still have a bleached scar area on my hip. I got it around my eyes, behind my knees and thighs, inside my elbows, and on the backs of my forearms. The site has moved as I got older. They always told me I'd outgrow it, but I never did.

The best solution for prevention is to slather on some baby oil or sunflower oil or body oil or the like, about a quarter-size amount for each body part, right before you get out of the shower. Don't wash it off, just sort of rinse a second. Pat gently dry with a towel, leaving some time for the oil to soak in to your skin a bit. Alternately, that Olay MoistuRinse stuff works okay and is less messy, but not quite as effective.

Salt water and chlorine aggravate the shit out of eczema. I know you can't avoid that stuff due to your job, but rinse off as quickly as possible and apply a light body oil or a really rich lotion, and it will help.