Hair after Brow Lift

I had a brow lift 9 months ago. 3 months after surgery the hair close to the incision line and random pieces on top of scalp have become coarse and wiry. The hair affected is only on the top of my scalp. Hair Everywhere is just the same as before the surgery. Could this be the result of anesthesia or damage to the hair follicle due to the surgery incision or possibly lack of blood flow/poor circulation from cutting on my forehead/scalp? My hair was soft prior to the surgery.