Hi there Anya324, and welcome to the Forum
. Answers are not always immediate, as most of us work, but will do my best for you now!
You asked about the spasms that most refer to on here. This is a sensation (sphincter muscle opening and closing, so to speak), which is intensely painful after a BM, and can go on for hours. Mine were nearly always in the 4 out of 10 range, and I found (and sometimes still do)it difficult to move around, but rather lay on the sofa on my side waiting for the pain to subside. Hope that clears up what the nasty spasms are with anal fissures.
You can't miss them!
I have not had surgery for AF, so it is difficult for me to comment, but can only refer you to the others on here who have had LIS and gone on to live their lives, never to darken our doors again. Davo is one recent one, and if you look for his name under the Memberlist, then look and click on 'posts started by Davo' you will find his report. There are many others.
Where it comes to Advancement Flap I really do not know much about this, and possibly someone will come on and provide you with some information on this. All I have read gives me the impression that it is a little more complicated than a 'simple' LIS, and that not so many are done these days. But, don't hold me to that.
If you enter 'advancement' in the search facility, you will find posts from those who have had this surgery which might be of help to you.
Hope this is of some help. We are here for you. :D
He looked me straight in the eyes and said "you have to let me fix it" and I nearly cried. I am 31, have 21mo b/g twins (via a dear friend that acted as our surrogate) and have had 9 surgeries in 12 years between endometriosis, lower back problems, Hemorrhoids and a wonky Gallbladder 
. So glad I married a great guy with awesome health Insurance! 
I asked Dr about recovery time and he says 3 weeks~he wants to do a fissurectomy and I requested that he do an LIS as well to prevent future spasms~side note: what is this spasm thing ya'll talk about? what does it feel like? I have a terrible pain in my gut (right behind my bladder) before I poo sometimes...is that it? Seems to high up to be my internal sphincter...always assumed it was endo around my bowels...? Anyway, I scheduled surgery for the 29th of Oct so I could get a schedule worked out for the twins and be able to go to a dear friends wedding but today I was encouraged to do it sooner. So I rescheduled it for next thursday (11th) pending Dr approval/orders. I am also waiting to hear back from the office cuz I need some clarification on the difference between a fissurectomy and the V-Y advancement flap and why he's choosing the fissurectomy. If anyone can help w/ the first part of that I'd really appreciate it! Also, I just need some general encouragement...I know I have to do this otherwise I'm in for a lifetime of being afraid to poo and possible complications like abscesses and fistulas...But I have done anal surg before, without kids, and its the pits. Even with help, I don't know how I'm gonna survive?!? Thanks so much! Anya
WOW 
