I've had a fissure since July last year and finally had an operation last Thursday where they injected botox. I didn't have any pain at all after the operation (It usually only hurts during a bm anyway), so I was relatively optimistic.
But ever since the operation I have been suffering from awful constipation. My diet is the same, I'm still taking lactulose, but I just cannot go, and it's complete agony. The operation was supposedly supposed to relax the muscles, but I've spent so long sitting on the toilet in pain trying to go they've been in more stress than ever. I have no idea if it was caused by the operation or not, but still being unable to have a proper bm 5 days after the operation I'm becoming increasingly worried.