Daughter will not eat, has been a week?

Since my mother, my daughter's grandmother, has died, one of my daughters has fallen quite ill and refuses to eat. she has lost alot of weight and is beggining to look very bony. I've tried everything I can but she refuses. she is also looking pale. I tried taking her to the doctors but she ran away every time I tried. I don't know what to d, she is killing herself.