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Hello and thanks for your question.
Yes, I do think you should take her to the ER. With pain and redness (and swelling, likely) above the eye and a fever and headache, she could very likely have what is called preseptal cellulitis, or worse yet, orbital cellulitis. These can be very aggressive infections in children and should be treated promptly. The emergency physicians and and/or ophthalmologist would then be able to start treating this problem.
Does that help address your concerns?
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