My thirteen year old daughter has been complaining about her back and neck hurting for several weeks now. Her head has also been hurting her, she says it feels like there's pressure in the back of her head and occasionaly on the top. I have noticed also that she has had a loss of appetite recently and somewhat blurry vision as well.

Is there some reason why she hasn't seen a doctor?

What tests has the doctor done? What diagnosis, if any, did the doctor provide? Surely you've already gone to the doctor, since this has been going on for weeks.