Time heals all wounds, so the saying goes. But that’s not always the case. Sometimes, when a loved one dies, it can feel like we’re stuck in an endless loop of pain. In this episode Dr. Sanjay Gupta speaks to Wendy Lichtenthal, Director of the Bereavement Clinic at Memorial Sloan Kettering Cancer Center, about why we grieve, how to navigate the grief process, and a new medical diagnosis: prolonged grief disorder.To learn more about how CNN protects listener privacy, visit cnn.com/privacy