Overview
Black and blue marks on the skin, or bruising, is caused by damaged capillaries under the skin. It is usually caused by blunt trauma to the area. In most cases they heal and go away eventually but in some...
Tammy Kane is a freelance writer and has written an advice column for a web-zine as well as for articles on associated Content. She has degrees in both Psychology and Criminal Justice, and has been a practicing herbalist for over 13 years.
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