injury to tissues with skin discoloration and without breakage of skin;
blood from the broken vessels accumulates in surrounding tissues to produce pain,
swelling, and tenderness.
The discoloration is the result of blood seepage just under the skin
. Called also bruise

contusion

an injury that does not disrupt the integrity of the skin, caused by a blow
to the body and characterized by swelling, discoloration, and pain.
The immediate application of cold may limit the development of a contusion.
Also called bruise.

Bruises occur when blood vessels break, due to some kind of force, and leak
blood into areas under the skin.
The main symptoms of a bruise are pain, swelling, and skin discoloration