Ecchymosis

Ecchymosis also known as Bruise/contusion/Haematoma is discolouration of the skin, resulting from bleeding due to any kind of trauma. 

It can also be defined as Extravasation of blood in surrounding tissues underneath the skin.https://www.youtube.com/channel/UCs99x4cG5UvQKnRBKbCl34Q?sub_confirmation=1

Ecchymosis/Bruise/Contusion/Haematoma