DR P. MARAZZI / SCIENCE PHOTO LIBRARY DR P. MARAZZI / SCIENCE PHOTO LIBRARY
Bruised fingernail. Blood under the fingernail of a 56 year old man, 7 days after the accident with a log splitter that caused the injury. This condition, also known as a subungual haematoma, occurs when blood vessels beneath the nail rupture. In this case, the blood had to be drained surgically (trephination) by lancing a hole (at centre) in the nail using a hot needle. In most cases of subungual haematoma however, the blood drains away by itself after a few days.
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