'Intra' -'within' and 'haematoma'='a confined lump of blood', so an intramuscular haematoma is bleeding within the muscle tissues.

An intramuscular haematoma is when the muscle fascia ('casing') does not let the blood escape so it stays in the muscle longer often increasing pressure in the muscle. Swelling and pain generally lasts more than 48 hours.


An overview of acute muscle and tendon injury around the knee.



Spontaneous muscle haematomas: management of 10 cases. Palatucci V, Lombardi G, Lombardi L, Giglio F, Giordano F, and Lombardi D. Transl Med UniSa. 2014 Sep-Dec; 10: 13–17.

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