Oh boy...I had this same problem a few years ago. There's a couple of things...first, does she know why she got them in the first place? I got mine after being constipated for a week and when I finally did "go" I tore myself. Yeck.
The problem with anal fissures is that sometimes when they actually do heal they leave a skin tag. Which just feels sort of like a hanging piece of flesh. The reason why this happens is because your blood goes to the area to try and heal itself and it basically becomes a vicious circle of non-healing.
The best thing she could do to help is to take warm sitz baths...it's just a plastic bowl that goes in your toilet seat. You can pick them up for about $12 at a pharmacy. She should do this AT LEAST three times a day...especially after a bowel movement. Really they're just a quick alternative to taking a full bath.
The warm water helps to relax both the voluntary sphincter muscle (the one you can move to get your poop out) and the involutary sphincter muscle (that's up a little higher and you have no control over it...sometimes what happens is that that particular muscle can get too strong and it prevents blood from flowing properly to the area which just aggravates the bleeding all the time...no matter how gentle you wipe yourself.) She shouldn't use any soap...just plain warm water as hot as she can stand it for about 15 minutes 3 times a day. Also, any kind of over the counter medicine should not be used cause they are for hemorroids and not anal fissures. It would be the equivalent of using Preparation H on a cut on your knee! Also, when she wipes after a bowel movement she shouldn't actually wipe but rather she should BLOT the area. Wiping pulls skin, blotting does not.
She should also start bulking up on fiber. If she can't get enough fiber she should take a supplement of fiber and she should take it in conjunction with stool softener. She needs to keep things loose and flowing down there if it's ever going to heal! One rabbit pellet type of poop is enough to send her backwards ALL over again. God, I remember what a literal pain in the ass all this was!!!
When I went to the doctor for all this about three years ago the above treatment is what he had me do first. He said to give it a full month and if it doesn't heal after that to come back. Well, I wound up not completely healing and was bleeding fairly bad as well as the area being in intense pain. (I was going to art school full time at the time too!) It turned out that my involuntary sphincter muscle had gotten SO STRONG that it was essentially locked in a permanent charlie horse! OUCH! OUCH! OUCH!
I wound up having a little procedure called an anal sphincterotomy, that's where they just make a little cut into the muscle to get it to chill the heck out! I've been fine with all that since then. (As a side note sphincter refers to the shape of the muscle which is round like a rubber band.)
Basically the whole situation made me feel ugly and old (I was only 26 at the time) and to make it easier for me I just talked openly to my friends and family about it. I told them I was the biggest TIGHT ASS they knew!!!!
If you have any other questions feel free to pm me. I hope this helps her though.