Causes:
These are the result of a blunt injury caused directly by a violent blow such as a kick while playing football or being struck by skis. The result is a large bruise which usually appears only after a few days.
Symptoms:
Tension and pain, possibly impairment of muscle and joint function.
First Aid:
Support the extremity in a raised position.
Later, cool with ice cubes or cool packs. An ointment dressing with Traumeel is recommended.
Link for more information: NHS

