this 4 year old starts out with a small red spot on hand in | Figure 1

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this 4 year old starts out with a small red spot on hand in within 2 weeks it looks like the last picture. Does not itch. No drainage. Mostly flat. ALL labs within normal limits. Dermatologist was unsure. ID doc was unsure. Anyone have an idea? It's very strange...kid lives in Texas.

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