When to stop getting PDL for pink skin? (photo)

I have had two PDL sessions to help heal post inflammatory erythema (PIE) pink skin caused by trauma. My skin looks pretty good now, but there is a faint pink shadow. 1) It's worse in my right eyebrow and I THINK the PIE skin feels a little bit raised (does that make it a scar?) It's been 11 months since the trauma. 2) Are there risks to getting PDL when you don't really need it? (Do I still need PDL treatments?) How do you know when to stop? Thanks so much for your help, appreciate it.