Also, they were first discovered in 1988 and were called bone marrow edema (Nichols, “Bone Bruise: Symptoms, Treatment, and Outlook.”). Bone bruises usually come from a direct and sudden compressive force through direct contact with an object (Noyes and Barber-Westin 87). They can also occur from a force that is not strong enough to break the bone (Noyes and Barber-Westin 88). Bone bruises are very common in sports that involve a large amount of falling and hard contacts with objects or other players (MD Health, “Bone Bruise: Types, Causes, and Treatments.”). Twisting injuries can result in sprained ankles and knees and can be accompanied by bone bruises (MD Health, “Bone Bruise: Types, Causes, and Treatments.”). Bone bruises have three different types: subperiosteal hematoma, interosseous bruise, and subchondral bruise. A subperiosteal hematoma