Is ND Yag a good laser and how effective is it?

Hi TM.  Although it looks like the treatment was a bit aggressive, it also looks like you are healing well.  Flaking, scabbing and sometimes even bruising can accompany q-switched Yag laser treatments and we normally prepare our patients for having social downtime of about 5-7 days....

There is no problem using Q-switched lasers in a younger patient.  The question is whether this is the right treatment for your skin and whether your parents agree with this treatment.  I would recommend exploring those questions before deciding to move forward.

Unfortunately this can happen and it is called post inflammatory hyperpigmentation.  You should be treating this with bleaching creams and sun protection.  It may take 3-6 months for improvement.  I suggest waiting on any additional treatments at this time.  Best, Dr. Emer.

I have never found laser treatment to be valuable for PIH, I suggest lightening creams and noninflammatory peels.  The picosecond lasers may help but I would avoid that for now till you try more standard treatments.  Sun protection is essential.  Best, Dr. Emer.