I didn’t have gum bleeding or any gum issues prior to using this. I only bought it because I needed toothpaste and it was what my store had. The ingredients aren’t anything special, it’s just stannous fluoride. I’ve been using it for three days, morning and night after flossing. My gums HURT. I have very healthy teeth and take my dental care seriously so I know I don’t have any issues to cause this. It’s even made the underside of my tongue hurt. Going back to Crest. My teeth do feel clean after, but no more than any other toothpaste.