Scratching/sores: What is this?

[DalesWidda]

My daughter has severe severe itchy skin. She also has keratosis pilaris, which is something with her hair follicles. She has the worst case of dandruff I've ever seen on a child. We've use Sarna on the skin, apple cider vinager on the hair. Lately she has been scratching so hard and I started recently noticing these red sores. Now I don't know if this is a new skin condition on her and she is scratching at it, or if the sores are simply from her scratching so hard. Any ideas? I do have an appointment with her doctor next week, but I don't know if I will get any concrete diagnosis.