Try sensitive skin lotion, lubriderm. Rub it on that spot 3 times a day, also get some hydrocortisone creame and use them together. If you do that daily for a few weeks, and keep the area clean you should be fine.
Hi,
I think it could be Irritant Contact Dermatitis.
I think anti-histamine orally and local Hydrocortisone cream should help.
Hope this helps.
Bye.