DS (11) suffers from terrible anxiety which spikes from time to time and can be debilitating. He manages to attend school after much persuation but goes off food for days. Today he had 2 spoons of cereal, at school for lunch he ate half a sandwich and gave his pudding to his friend. For dinner we got a takeout because DS likes it and I was hoping he would eat. But he managed a couple of fries before saying he cannot eat any more. He just can't eat properly because of the anxiety. What can I do to help him eat? He is underweight as it is. I'm so worried.