In contusion, the injurious action of the trauma is variable, but mainly affects the blood and lymphatic vessels, causing blood extravasation in the layer next to the surface of the skin with pain accentuated by movements (both active and passive) and by pressure on the part.
Bruises are of various degrees and entities: from ecchymosis (the classic bluish bruise) to the formation of a hematoma (collection of blood with superficial swelling), up to skin necrosis (ie the death of a layer of skin cells).
Normally, a bruise tends to resolve spontaneously within a few days, but some remedies can be used to speed up the healing process.
The bruise is commonly called a "blow".
, together with muscle fibers, it is squeezed.
In practice, contusion occurs when the skin does not undergo a laceration, but the capillaries located below the skin tissue are damaged and the blood inside them pours out, remaining trapped in the layer next to the surface.
