A laser comb basically , because of the light,  'helps' in hair growth. It may or may not work . And it's definitely not the treatment of choice. And are you getting treatment from a dermatologist? Then why not consult the doctor about the laser comb?. Do not mix treatment or use products without letting your treating doctor know. You never know what cross reacts and gives you a reaction. Hair treatment takes time please. Do not hurry. And keep patience. You will get some results. Once you get the results ask your dermatologist on how to MAINTAIN it. That's important. And modify your lifestyle. It works wonders. Eat healthy sleep on time and exercise.