I have a cut from anus to vagina. how do i heal it quickly?

You didn't say: How you got this "cut" and that makes all the difference in my answer. What you describe is similar to an episiotomy. If the cut is from trauma from an assault or if it is a superficial abrasion also can effect my answer. Whether the sphincter muscles have been torn or cut, whether there is an infection or std related contamination also affects my answer. Essentially, i need more info to even atte.