Swish warm salt water around in your mouth, that will help.
Try 2 teaspoons of salt in an glass of water.
what livinkarma and taylor said
Mouth wash Listerine that will do it, will burn for a minute but afterward your cut will be healed.
about a pinch of salt. DON'T DRINK IT. You won't believe how many people do.
Mostly what people do is gurgle salt with warm water together for the solution. That is true. But there is another way and may help you. If your gum is cut, you should eat a lot of Vitamin C. It's very helpful. I once had my gum cut. And it helped. And it healed in a few days or a week. So hope your gum heals soon and hope this was helpful