I wonder if inducing small injuries can cause repair pathways to turn on, promoting overall healing if the initial damage was little. Like how mild exercise causes DNA damage which stimulates overall repair, and you can come out ahead as long as the damage isn't too great (don't exercise too much at once).

Influence of Acute Exercise on DNA Repair and PARP Activity before and after Irradiation in Lymphocytes from Trained and Untrained Individuals https://sci-hub.st/10.3390/ijms20122999