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"Photos you take of yourself during a dive trip can be helpful to Divers Alert Network. "One common diving injury for which the selfie may be useful is cutaneous decompression sickness, or skin bends," writes DAN's medical director Petar DeNoble in his Dive Lab blog. "It can be confused with allergies, bruising, marine life injuries and other conditions . . . We at DAN have a very limited collection of skin DCS photos, so we propose that divers use their smartphones and digital cameras to document their skin rashes, and send or bring the photos to their doctors for evaluation." Take the photo in an outdoor shaded area, because harsh sunlight might make contrast difficult. If you have any skin changes after a dive, take a selfie of it, send it to DAN and call their emergency line (919-684-9111) for assistance."