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a vesicle, especially a bulla.
blood blister a vesicle having bloody contents, as may be caused by a pinch or bruise.
fever b's herpes febrilis.
water blister one with clear watery contents.
a blister containing blood; resulting from a pinch or crushing injury.
blood blisterA collection of blood between the epidermis and dermis which is caused by minor skin trauma—e.g., a pinch or crushing injury.
blood blisterDermatology A collection of blood in a skin blister caused by minor skin trauma–eg, a pinch or crushing injury
blood blis·ter(blŭd blis'tĕr)
A blister containing blood; resulting from a pinch or crushing injury.
A small subcutaneous or intracutaneous extravasation of blood resulting from the rupture of blood vessels. See: illustration
A firm dressing should be applied with moderate pressure to prevent extravasation and hasten absorption of blood. In some cases it is desirable to puncture the wound aseptically and aspirate the contents.
See also: blister