Hello. Thank you for writing to us You have developed irritant dermatitis to toothpaste. I understand your concern because it must be unsightly and making you conscious in front of others. I suggest you to use an OTC topical steroid e.g cortisone cream, twice daily over the irritated spot. That should make it fine in about a week s time. Avoid soaps. Use a gentle cleanser instead e.g cetaphil cleansing lotion, twice daily. Protect from sun. You may use a broad spectrum sunscreen, throughout the day. Regards