Rub marks on baby balls???

Well I had a clutch hatch out in July and was getting excited about this weekends NARBC show to try and sell them off. Well here comes the shocker. I fed them tonight and noticed one of my spiders, and one normal baby had small lumps and what appears to be a scab right on top of their heads. I have seen rubbing on larger snakes but never on a baby. Now I am not sure if I should even take them to the show. What should I do.

I would wait for them to heal up. What are they rubbing on?

I have no idea they are all in my RBI hatchling rack. I will take the others but will leave the little rub mark ones at home. I will be having them on someones table at the show and would not want people to see them and think bad of their animals.