Idol,
I'm really not sure. All that I have read says having them removed with LIS can promote healing. I guess it could depend on how bad they are too. Mine was pretty big and caused a whole lot of swelling in that area before having it removed. You would think all the swelling couldn't help the fissure since it makes everything so tight down there
When I asked my CRS before having it removed if it would hinder healing of my fissure with my LIS, she said no but it could cause me a lot of problems in the future...