Hi there ~
I understand your concerns. When you are anorexic and are of caucasian origin it is not unusual to have blue veins
that appear prominent. Once your regain your lost weight or start gaining weight they will gradually lessen and your will appear normal. I would like you to distract yourself from the veins and focus more on the weight gaining part and becoming healthy. The veins will ultimately go away. I hope this helps. Take care and have a lovely day!