<s>[INST] my 4 yr old son got a single red spot on hid stomach that had a yellow head. He scratched the spot and it had spread into quite a large scab. Since then he has developed two more of the same spots (a couple of days later) We have no pets. He had a fever 7 days ago that lasted 24 hrs. Thanks [/INST] Hi...by what you quote it looks like impetigo or pyoderma or a skin and underlying soft tissue infection. It requires antibiotic and a direct look at the lesion. Skin conditions are best diagnosed only after seeing directly. I suggest you to upload photographs of the same on this website, so that I can guide you scientifically. Hope my answer was helpful for you.  I am happy to help any time. Further clarifications and consultations on Chat Doctor are welcome. If you do not have any clarifications, you can close the discussion and rate the answer. Wish your kid good health. </s>