My tooth is broke and it's sharp on site and it has cut my lip on the inside of my mouth and has created a sore now and i have been putting peroxide on it to clean it but it just keeps hurting i'm wondering is it okay to put neosporin on it

Not recommended: To heal the sore in your mouth, first step is to stop the abrasion from the sharp tooth. Your dentist can smooth the area or apply a filling. Although safe to use neosporin, the mouth sore will heal fine with warm salt water rinses and you can apply oragel or benzocaine in orabase for pain relief.

Yes: but Bacitracin is safer. You need to get that tooth fixed! Get some dental wax in drug store to dull the sharp edge until you can get it fixed. It will only continue to bite you otherwise. Good luck