The act of contracting some ailments is sometimes described as "breaking out." I can only think of examples that use skin ailments. You can break out in a rash, for instance. Or you can break out in hives, which is another skin ailment. Teenagers break out in zits (or 'pimples').
'Sediment' is a fancy word for 'dirt.' ![Smile [:)]](/emoticons/emotion-1.gif)