I've had some tell me it can't be done and one try unsuccessfully with a laser. It just scabbed a little bit and peeled like my lips normally do but no change in white dots or the color of my lip. I'll try again at some point but I'm going to attempt to get the peeling under control first, if possible.
I've read that electro-dessication is a possibility. I have yet to discuss this with a doctor, though.
Try to remember the type of laser and the settings if you do go that route. I don't remember the ones used on me but different settings might produce different results. Good luck, I hope it works for you.