Why have brown lines appeared along smile line after Halo Laser treatment? It had been 3 weeks after treatment. (photo)

I agree with my colleagues below.   You appear to have hyper pigmented in these areas.   Follow up with your provider.  Often a topical hydroquinone can help to fade theses.   Your provider should have a protocol in place to treat this issue.  Best of luck to you!

I would agree that this is post inflammatory hyperpigmentation (PIH). this is common in Asian, Pacific Islander and Latino patients. You may notice darkening of other scars as well. This should improve over time and bleaching agents may be of benefit. Other than that, your skin looks great after the Halo treatment. If the nasolabial folds are still an issue I would recommend some filler in your cheeks to resuspend the midface. That is very effective in taking care of the deeper folds

Your specialist will know the settings and passes. This maybe PIH - or post inflammatory hyper pigmentation. Usually from the erbium component of HALO will contribute to this. Go back to your physician, they can diagnose, exclude irritant dermatitis and prescribe bleaching agents. This should fade over the next few weeks. All the best, Dr Davin S. Lim. Brisbane. Australia.