Can a family bereavement cause eating disorder?

Yes: Eating disorders are caused by underlying psychological distress, often associated with depression, so a family bereavement could lead to this. However the affected individual should be seen as early as possible by their physician and referred to get help from mnetal health professionals. Early treatment works best and leads to least physical harm being incurred.

Probably not: No one really knows what causes these highly heritable brain disorders. But certainly bereavement can cause all kinds of life disruptions, including disordered eating.

Grief: Grief can affect your eating habits but not cause eating do.

Bereavement ?: Can cause depression , decreased appetite , decreased or increased sleep , decreased energy and guilt feeling.

Keep an open mind: Try to be careful about thinking in terms like "cause". A stressful event or can provoke a person into displaying symptoms that might not have been expressed otherwise. That is different from causation. Yes, death of an important person can expose powerful feelings. Eating is a very emotional thing in our society. In civilizations where eating is basic life support it may not happen.

Possibly: People react differently to a family bereavement. Most have grief ; are "simply" sad about the loss. Others may have a more serious depression or anxiety symptoms. Since eating disorders sometimes accompany depressed mood ; anxiety, this could also follow a bereavement. Also, some eating disorders seem related to psychological conflict; such conflicts may worsen during/after a loss.