Will the scar from Hyfrecator go away?

I would start with an intense skin rejuvenation protocol for age spots that includes fractional laser, Covalent chemical peels, and daily skin brightening creams to improve your skin’s complexion. Laser therapy must be combined with a proper skin regimen to enhance and maintain youthful results.
The following skincare products for dark age spots: Melarase
MelaClenz Brightening CleanserMelarase AM: Day-time skin lightener with SPF 30Melarase PM: Night-time skin lightenerMelapads: Daily Exfoliating PadsReplenish Retinoid Cream: Exfoliating and skin-stimulating night creamBest, 
Dr. Karamanoukian
Realself100 Surgeon

Hi Happy.  A hyfrecator can sometimes cause more damage than a laser because it uses a metal electrified tip that is controlled by the hand movements of the practitioner.  If the user of the device leaves it too long on the same area, it can cauterize (burn) into the dermis and this is what can cause permanent scarring.  

If the spot you had was a sun spot (lentigo or flat brown spot) then lasers would have been our choice.  If the lesion was a seborrheic keratosis (bumpy brown lesion) then a hyfrecator may have been a good choice.

The scar should heal if you keep it out of the sun and keep it moisturized.  The extent of healing will depend on how deep the treatment was. 

We are also in Los Angeles and offer free consultations.

 

Brown spots can be treated by a variety of methods.  They can be frozen with liquid nitrogen, zapped with a laser, or burned with a hyfrecator.  Which method is used depends on what type of brown spot it is (sun spot, seborrheic keratosis, etc) as well as the preference of the physician.  Any treatment method has a risk of leaving a red mark, and/or a lighter or darker spot.