Hello, I understand your concern. I am Dr. Arun Tank, infectious diseases specialist, answering your query. In my opinion it should be allergy reaction. As per your description of allergy is more likely explanation of the condition. I suggest you to find out the possible ballet gen causing this reaction to skin. Biopsy report is also pointing towards this condition . I advice you to apply clobetasol cream. As this can cause atrophy of the skin bumps resulting in clear skin. Please do not use this cream for long time as it can cause skin thining for long term use. I will be happy to answer your further concern, you can ask me on bit.ly/DrArun. Thank you. Dr Arun Tank Infectious diseases specialist.