(From Eccymosis Ecchymoma 3131 , to pour out, or from without, and juice,) exsuccatio. Sometimes Crustula and Sugillatio are applied in this sense; which see. It is an effusion of humours from their respective vessels under the integuments; either from a relaxation of the exhalants, or a bruise and consequent rupture of the vessels themselves. This blood, when collected under the skin, is called an ecchymosis; the skin in the mean time remaining entire, sometimes a tumour is formed by it, which is soft and livid, and generally without pain. If the quantity of blood is not considerable, it is usually again absorbed; if great, it sometimes suppurates; and any-further inconvenience seldom follows: a mortification may, however, be the result in diseased or languid habits. Dr. Cullen places this genus of disease in the class locales, and order tumores, and defines it, a diffused tumour, a little elevated, growing blue or black. The causes are, pressure or bruises: from the latter the ec-eymoses are called stigmata. They sometimes also arise from blood letting, either in consequence of the orifice in the skin sliding over that of the vein, or from the vein being cut through. Livid or black spots are sometimes a symptom of the scurvy: when round and small, they are named thrombi; when more diffused, ecchy-moses. It should not be mistaken for a spurious aneurism. See Aneurism.

In slight cases, compresses dipped in vinegar, or in water so strongly impregnated with salt as to suspend an egg, frequently applied and kept upon the part, are alone necessary. If the ecchymosis tend to suppuration, it must be treated as an abscess. If the quantity of coagulated blood be considerable, it must be discharged by as many incisions as are requisite; then treated as an approaching mortification. See Bell's, White's, and Heister's Surgery. Van Swieten's Commentaries on Boerhaave's Aphorisms, sect. 324, 1151.