HI,
I assume this was on the face, if it was, this is too long for these issues to be occurring and I would recommend your provider to take a look. If it was on the neck or chest (off the face) the healing can be delayed, but typically not this long, but sometimes yes.
Thank you for your question. I am sorry you had a poor experience. Fortunately, time does resolve most hyperpigmentation from laser treatments. Halo would likely be too harsh for this area and for your skin complexion. I would go with a gentler, more repetitive approach like microdermabrasions...
Hi,
I wouldn't recommend anything before your HALO except sunscreen and sun avoidance as well as hydration. Stop any retinoids a week before treatment, avoid any peels and dermabrasion for a month before to minimize any risks associated with laser treatment.