Coxsackie?

Evan is not feeling well. Poor guy. He's not been feeling great for the last few days and when he got a blistery rash to go with it, we took him to the doctor. She looked at his hands and said, "He's got Coxsackie virus". What? It just so happens that we live not to far from Coxsackie so, we know how to pronounce it (For those not of the 518, you say "Cuck-sock-ee"). But what is it? He's got a virus that gives you blisters on your hands and feet and in your mouth. Needless to say, he is not a happy camper right now. I am trying my best to help him feel comfortable, but I feel so bad for him. He's usually very easy going and a trooper through hard things, but the last few days he has definitely not been himself. He doesn't want to eat (except for drinkable yogurt) and he cries and is having a hard time sleeping (definitely not Evan's usual, put me to bed now and leave me alone behavior). His beloved sucking thumb is even covered in blisters! Anybody have any suggestions to make him feel comfortable? How about foods that you can eat comfortably with a blister-filled mouth?