How can I remove these hyperpigmented (2nd degree) burn scars after laser hair removal? (photo)

I recommend following up with a cosmetic dermatologist for after care and treatment for hyperpigmentation. I recommend Silagen + Bioshield to promote healing. This can be improved with a combination of lasers, Aerolase, microneedling/prp, skin lightening, peels, and skin care. Sun protection is essential. See an expert. Best, Dr. Emer

Thanks for your question and posting a picture.  You were badly burned.  You should follow up with the supervising physician where the treatment took place.  We test spot darker skin type patients with 1-2 pulses someplace that won't show.  After you are healed, you need to find a differently place!
If LHR hurts that badly, you are in the wrong place.  Based on your skin type,, you should have sought out a laser vs. IPL to help avoid complications.  Almost all newer lasers are safe for all skin types and have features built in (such as sapphire cooling tips) to make them more comfortable.  Some of the newer technology is also more efficient, allowing for lower energy settings to be used with better results and less discomfort.  With modern equipment, your treatment should only be mildly uncomfortable, but not painful.  We never use numbing cream for LHR.  We want our patients to be able to tell us if they feel pain or an unusual level of discomfort.We recommend finding an experienced and reputable provider in your area with updated equipment.  A consistent overlapping technique is the key to avoiding patchiness in LHR.   Calibration and power of the laser is important for a safe, comfortable and effective treatment.  Find out what laser they will use and if it is under a maintenance contract.  If their laser isn’t calibrated on a regular basis or is underpowered, your treatment may be painful or inefficient. After a series of 6-8 initial treatments, you may need a touch up every 3-5 years.
Best of luck.