I was recently told i had a fissure (paper cut on my anal canal) how can i get rid of it so i can start back doing anal with my bf?

Rest: Sit in a hot bath for 20-30 minutes a day. Take a fiber suppliment so you don't strain too much going to the bathroom. Finally, stick to vaginal intercourse until the area heals.

You can't : You need to give it time to heal on its own. This can take a few weeks to completely heal. Constipation can also exacerbate the fissure. Any trauma to the area before it's healed can lead to infection, bleeding, or in serious cases, issues with continence.