挖瘡疤Picking at a wound

I can't help it. Every time a wound is about to heal I have to pick at it, make it bleed, feel the pain all over again. And I regret, vow to ignore it. Then the itching feeling lures me to commit the miserable deed over and over in the hope that the wound will heal better than the last time. 手賤沒藥醫！