question: Hello doctor, My brother was a varsity swimmer at his high school four years ago, but had to quit when it appeared that the chlorine was causing skin irritation. Ever since, his skin condition has persisted, which involves dry, brownish patches under his armpits (he has white skin), a cracked, scaly pattern of dry skin on his lower back, and dry skin patches all over his torso (reminiscent of desiccated ground pattern in a desert). He has been to many doctors, who have all prescribed various creams, none of which seem to work. I will attach a photo. Have you seen anything like this before?