Hi Jenny,
Many, many people are able to see their fissures from the outside. Most fissures are just tiny paper cuts and LIS is for that. Once your internal sphincter is in spasms any poop ,even soft can cause the re-tears. Usually when we start to poop with a fissure, the Internal muscle that we can't control will clench and cause the re-tears. You can do all the slow breathing, relaxing that's possible and keep the bm's soft but if that muscle clenches/spasms a re-tear will happen. Mine were so bad I could barely have a complete bm ever. I had to go the the potty nearly 10 times a day to get a fair amount of bm out. I would get my fissure to heal enough to have a complete bm (all in one go )about every two weeks and then it would clench/ spasm and re-tear and I would start all over again. I would eat the same thing, drink a gallon of water a day, take the same stool softener and it would still happen
It sucks but it's really out of our control since the internal sphincter isn't something we can relax ourselves!! I would go to the CRS and really think about LIS if I were in your shoes. This just isn't any way to live in my opinion...