See a doctor: Without being able to see this and take a full history it is impossible to diagnose. Could be a fungal infection, allergic reaction, insect bite, contact dermatitis, and so on. Best to let a professional take a look and recommend treatment.
Answered 2/26/2013
5.3k views
Dermatologist: The cause of this oval patch can be several. Seeing your pcp or a dermatologist is the best solution.
Answered 5/27/2016
5.3k views
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