An accumulation of blood that clots within a muscle. It may be caused by a muscle strain, tear, or bruise. The muscle fascia and the epimysium remain intact, trapping the blood within the injury site. The intramuscular haematoma results in pain and tenderness, and it limits the ability of the affected muscle to contract or to be passively stretched. In order to avoid long-term problems, it requires quick initial treatment by, for example, RICE, followed by a treatment method that increases blood flow, such as diathermy or ultrasound. An intramuscular haematoma is more painful than an intermuscular haematoma and requires more rehabilitation, with emphasis on stretching and strengthening the affected muscle. Occasionally, a cyst develops in an intramuscular haematoma that requires surgical removal.
Subjects: sports and exercise medicine.