Hi Welcome. I have gone through your query. It might be contact dermatitis, but an examination would be helpful in confirming. I would suggest you to wash the area with like warm water, you mild soap like derma dew, do not run it. Allow it to try. You can use calamine lotion with alovera, which will provide soothing effect. I would soonest you not to touch of scratch it as it may lead to secondary infection. Along with it I would suggest you to take over the counter oral antihistamine like Diphenhydramine (Benadryl) or Cetirizine (Zyrtec), last one is less likely to produce drowsiness. If the calamine lotion is not helping, you can use corticosteroid cream to get relief. I would suggest you to follow the above measures, it should subside within week, in case of it persists or increases I suggest you to see doctor for further help. Yet , again I duly appreciate your query to me, I do hope that have found something useful to help you and I shall be glad to answer any further apprehensions. Sincerely,