This started after I used a oil, doo gro. It made my scalp burn so I got Head and Shoulders to wash it off after 3 months not knowing the cause. I used a comb to really scub my head with the shampoo and ever since my hair above my left temple is really thin. The back of my head was thin but it returned and also above my mid hair line but its reovering. My left temple however is still really thin, hurts, and has a couple of scars. I'm a 20 year old male by the way so could it be MPB?