I'm curious if you should rinse your mouth with water after using mouthwash?

Your choice: Rinse or not? This depends on what rinse you use. If it is for cavity prevention and the rinse contains fluoride, spit well, but best not to rinse--the remaining rinse continues to add Fluoride into your tooth. If it is to kill germs in mouth, ; you do not want the chemicals to be absorbed by your body, rinse off. Most otc products seem to expect no-rinse to offer its efficacy, however. Spit well.