Myositis ossificans is when bone tissue forms within a muscle. It is usually found in the thigh muscles where the hamstring and quadricep muscles are found. Myositis ossificans can develop when a contusion (bruise), repetitive trauma, or strain occurs to a muscle. Calcification and bony formation can occur in the injured muscle when a repetitive trauma occurs before the injured area has been completely recovered. Therefore, it is important to rest the muscle after an injury. To prevent a repetitive trauma from happening, one can use protective padding and perform stretches to avoid muscle strain. Intensive stretching and massage should be avoided because it inhibits healing and increases bleeding into the muscle. Myositis ossificans can also occur if the inflammation and swelling of the muscle is ignored after an injury.
Moreover, myositis ossificans can lead to swelling, pain when exercising, limited range of motion, a weaker limb, and a hard bump. However, it can be treated by resting the muscle, strengthening the injured muscle and the muscles around it, and working on flexibility and light stretching. In addition, ultrasound can also help with the healing process.