I bought these sensitive brush heads as an alternative to precision clean brush heads, as my gum was bleeding regularly. These sensitive brush heads are much softer, however, as a side effect, my teeth don't feel as clean/polished compared to with precision clean brush heads. Meanwhile, I used Kin mouthwash and toothpaste to stop the bleeding, which worked very well. It's been about a month since I stopped using the mouthwash (just the toothpaste) and my gum no longer bleeds even when switching back to the stronger precision clean brush heads. What I've concluded based on my experience is that, if you have bleeding gum, it's much more important to treat it using medical aids such as mouthwash and toothpaste instead of a softer brush head. Though softer brush head may cause less bleeding, it's certainly not a permanent solution in the long term.