Is this hyperpigmentation permanent following laser hair removal after SMP? (Photo)

Scalp MicroPigmentation or SMP is basically a tattoo.  Laser tattoo removal does not usually cause hyperpigmentation.It is best to see your doctor or a dermatologist for an examination.

A bit hard to say from the one photo.  It takes 6 weeks for skin cells to be replaced, and it can take more than one cycle for things to settle out so whatever you're seeing isn't necessarily permanent.  Follow up with the physician who prescribed with hydroquinone.  

SMP removal is typically very low power laser treatment and typically unlikely to cause post-inflammatory hyperpigmentation.  Were you seeing a dermatologist for these treatments?  If not I would seek advice from a good derm in your area, one who really knows lasers, and get a second opinion with an in-person exam.  Good luck!

You have clearly seen a doctor who prescribed medication for you. Go back and speak with your doctor who seems to understand your situation