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Greetings,Thank you for your question.I am Dr. Su S.I will try my best to help you.
Is she 7 years or 7 months old?
When did it develop?
Is there any pain, itching?
Does she have any other symptom?
Did you try any medicine/cream?
Thank you for the input.There can be dermatitis.A fungal infection is possible.You can try lamisil cream with hydrocortisone.Those will take care of those conditions.Sometimes, oral medicine would be needed.If you do not see improvement, I would advise to take an examination by doctor.I hope this information will be helpful.If you have any query, please feel free to ask.Wish her healthy life.Regards.