What Kind of Laser to Use on Cobblestoned Skin from Hair Transplant?

Surface irregularities in the skin following hair transplant are a common occurrence and will often improve in time without treatment.  Since you are four months post-surgery, I would not recommend laser treatment at this time. With any type of skin resurfacing treatment, you run the risk of damaging the transplanted hair follicles.  If the condition hasn't resolved after a year, you should see the plastic surgeon who performed your transplant for treatment recommendations.  Good luck to you.  

It takes about 8 months for all new hair to mature after a hair transplant.

Treating the areas with lasers will only increase the chance of new hair being damaged potentially.

Once you reach the 8 month mark re-evaluate condition.