Yes I do, in fact I always try and cut over an old cut so I don't get multiple scars.

*trigger*
When they start to heal, I get a bit sort of panicky and need to make them bleed again. I also cut internally and usually keep at it so it doesn't heal.

Feels like it's something about the healing? If it heals and disappears then so does that pain, and it doesn't get heard as always....