Purpura Purpura is multifocal extravasation of blood into the skin or mucous membrane.It is manifested by distinctive brownish red or purplish macules a few millimeters in diameter resulting from the rupture of the capillary walls at the arteriolar-capillary junction. Purpura ⚫ Purpura is multifocal extravasation of blood into the skin or mucous membrane. It is manifested by distinctive brownish red or purplish macules a few millimeters in diameter resulting from the rupture of the capillary walls at the arteriolar-capillary junction