How Can I Repair Heat Damaged Hair?

When I was around 14 my brother took me to the barber and made me get haircuts that looked good but required a hair dryer to maintain the look which I wasn’t good with. Every morning after having a shower I would use a shitty hair dryer on the max setting on my hair for a good few minutes to try and achieve the original look which I couldn’t really do and this went on for at least a year.

I thought I was balding since I could see my scalp when I looked close in the mirror but I wasn’t losing any hair and I was cutting my hair short so it didn’t really matter that much at the time but when I kept my hair longer it didn’t look pleasing so I decided to shave all my hair off because I thought it would remove all the “thin hairs” I had and then grow thicker hair which was all a waste.

That was two years ago and my hair is still weak and fine. How do I go about repairing my hair so it becomes thicker on the top? Should I use a Dermaroller?

Hair damage is solved as the new hair grows up from the scalp, while scalp damage to the growing hair follicles in the scalp can be permanent. See a doctor.