Local rashes and itching are mostly caused by the allergic reaction of that external drug.

If the slimming sticker is removed in time, it will heal itself in a week or so. If you don't feel better, you can take some anti-allergic drugs appropriately. Pay more attention to rest, keep a good mood and eat less spicy food. Avoid seafood. I hope this suggestion will help you. And wish you a speedy recovery!