Notice no "after" pictures to go with the "phimosis" one on the Wikipedia article
If performed by a doctor who has a particular interest in performing the surgery, it might well have an acceptable cosmetic result (a bit of a "sawtooth" fringe) and relieve the tightness. Somewhat. There remains a bit of a trade-off - the looser it is made, the more "ragged" the opening.
There is a trick about surgery on the foreskin - including in particular, circumcision. Surgery creates a scar, and a scar tends to contract during healing. If the scar is allowed to occupy the original position of the foreskin in front of the glans, then it will not be subject to stretching by erection - including not just daytime erections, but the quite frequent and prolonged erections during the night, so it will become tighter. Only if it sits behind
the head - or if you deliberately stretch it open frequently during the day - will it heal in a looser state.
In other words
, if you have surgery other than a complete circumcision, you must
continue to stretch it after the surgery for a couple of months. Now of course, in many or most cases, determined stretching will also
achieve a similar result, in a similar time, without
Unless there is a skin disease present (such as the "thrush" we so often describe), the only reason that "stretching isn't working", is that it is not actually being stretched
. And if stretching is not performed, an apparently successful preputioplasty will tend to deteriorate into the condition it was before surgery - because that is how the scar-forming mechanism in the body works - it is designed to restore a wound - including surgery - to its original state.