Hi,
Yes splits can happen but it is quite rare. Normally the split occurs when the dupuytrens has pits as well as nodules. The split happens when the skin has hardened so much that there is not enough skin to stretch when the band is broken. The usual place for this to happen is at the base of the little finger. A good practitioner of NA will know if a split is likely to occur and will only break the band halfway, which may cause a small split to happen, this then heals from the outside and a second treatment at a later date can then take place to straighten the finger fully. This happened to me. It was not a problem but choose your doc carefully and ask if it will happen to you.
Marjorie

Bob,
The first problem one has is that the doctor/surgeon you see to deal with your NA may live many miles away and it may be impossible to have a pre-procedure interview. I sent my details and pics of my hand to Dr Lermusiaux in Paris. I went to have the procedure on my left hand and this was the one that split so he could not complete the NA at that time. I made an appointment to go again to have the other hand done and at that time the first NA was also completed. There were three months between procedures but this was my choice as I decided to have two separat weeks holidays in Paris. Since Paris is only just over an hours flight away it was not a problem for me.
The scar I am left with is almost impossible to see and looks better than the thick ridge of skin which had formed, like a seg, do you use that word? Some days I have a little pain but no itching. Gentle massage removes the pain.
I do not know if there is anything one can do to soften the hard skin but regular use of hand cream will do no harm. I would suggest the use of cream which does not contain collagen, aloe vera or avocado is good.
Obviously, the risk of splitting increases with the degree of contracture. My hands were left too long due to my surgeon here saying they were not ready for surgery. When they were I opted out of surgery and jumped, praying, into the NA hole. I found that there was no hole at all, the only pain was from the initial injection, 20 seconds, a mere nothing. I doubt if I would have had any splitting if I had been brave enough to go for NA earlier.
Hopefully you have not waited too long for your procedure.
Good luck,
Marjorie

Yes it does occur--I had one of my three sessions with Charlie Eaton in which he could go no further as my skin did split. Not that much of a big deal though, as it will quickly heal if the skilled surgeon stops the NA treatment at that point.