When a sister or brother dies, the world of surviving siblings is changed forever in ways not anticipated. Although every loss is difficult, siblings face the most misunderstood grief. It’s no wonder – because even professional literature and research on the subject is lacking, which explains why the mental health field even misunderstands sibling grief. As it turns out, losing a sibling is among the most complex in terms of recovery. What is a Sibling? Sibling relationships