What happens when a bone loses its blood supply? In this episode, we explore avascular necrosis (AVN)—also called osteonecrosis—a condition where part of a bone begins to die because it no longer receives enough blood flow. Although AVN is uncommon, it can lead to severe pain, joint damage, and even collapse of the affected bone if left untreated.

Using clear and easy-to-understand explanations, we discuss how AVN develops, why certain bones are especially vulnerable, and what causes this condition. You’ll learn how injuries like fractures and dislocations can disrupt blood supply, and why conditions such as steroid use, alcoholism, sickle cell disease, and blood clotting disorders may increase the risk. We also explain why the hip, ankle, knee, and wrist are among the most commonly affected joints.

The episode also ex ...