Hypertrophic Scar After Mole Removal. Is it Okay to Leave This Untreated? (photo)

I had a mole removed by a dermatologist, and as it was initially healing, it was relatively flat. After a couple months, though, it formed what appears to me (based on a Google image search) to be a hypertrophic scar (raised, itchy, etc). My question: What if I leave this untreated? I've heard you can get injections, but the scar itself doesn't really bother me (appearance-wise), other than the intermittent itchyness. Will it cause problems, get worse, etc. if I just leave it?