A gluteus medius tear is a condition characterized by severe strain on the gluteus medius muscle that results in partial or complete rupture of the muscle. The tear or rupture of the gluteus medius muscle is commonly seen in runners and athletes involved in high-impact sports such as soccer or basketball. It can occur from sudden bursts of activity and poor flexibility of the gluteus muscle. Any traumatic or overuse injury, or degenerative changes can also lead to partial or complete tear of the gluteus muscle.