Hi aram,
I had my LIS on the 14th March and was told the greatest risk following surgery is infection rather than incontinence. Now the first thing i must add is that infection is rare after LIS, after all you have probably had an open wound with your fissure for a few months without problems so why would you suddenly get infected now?
So the signs to look out for are an increase in bleeding (not just a spot of blood on the toilet roll), an increase in pain after you thought you were getting better and discharge or puss.
If you have a look around the anal opening and you see something that looks like a spot with some slight discharge then that could indicate an infection or if there is a lump that is painful to touch.
Looking at your symptoms it could just actually be irratation you are getting from your surgical incision wound. At the stage you are currently at you could expect some weeping from the wound which would show as a light yellowish/browny staining. The wound could also be prone to a little bleeding as this actually takes longer to heal than the fissure itself. What i found is that the discomfort from the incision wound increased over time - the reason behind this is because the swelling actually protected the wound in the first place so when it actually reduced it left the wound more open to the elements.
Various websites to tell you to get things checked out once your temerpature goes over 38 so you are ok so far.
Anyway to put your mind at ease it is always advisable to go and see a specialist or a GP and to get things checked out properly.
Davo