I burnt my skin applying colgate toothpaste to my acne... nw how to get rid of this. can i apply lemon juice on it?

Enough is enough. : There comes a time when home remedies won't work anymore. Leave lemons for lemonade and see a dermatologist.

Off label use: Off label use of toothpaste, or any other medication/compound is not recommended, lemon juice will likely lighten the wound but not effect healing. Consult with a dermatologist regarding your acne, and the "burn", and stop using toothpaste other than its intended use.