Matching Pairs Nail DisordersOnline version Match the nail disorder to the correct nail disorder description. by Rosalind Carter 1 ridges 2 melanonychia 3 bruised nail beds 4 hang nail 5 splinter hemorrhage 6 onychauxis Condition in which the living skin around the nail plate splits and tears. Caused by physical trauma or injury to the nail bed that damages capillaries and allows small amounts of blood flow. Condition in which a blood clot forms under the nail plate, causing a dark purplish spot. Treated by trimming or bringing the nails down to size. Perfectly normal in older clients. Darkening of the fingernails or toenails.