Itching is part of the normal course of healing. Once the rebuilding phase is under way and healing continues, you may notice that the area itches.
It happens alongside the other things a healing wound does — filling in with new tissue, new skin forming over it, and the edges pulling inward as the wound gets smaller.
Itching is simply one of the things that can happen during healing. This page won’t try to explain why it happens.
There is one instruction that goes with it: do not pick at or scratch the scab. The scab protects the tissue underneath from germs, which is the reason to leave it alone.
Itching on its own, then, is nothing unusual. Itching alongside other changes is a different matter, and the things to notice in that case are set out below.
One more thing, for anyone further along: after the scab falls off, the area may look stretched, red, and shiny, and a scar can keep fading for as long as two years.