By that, I mean not the post-procedure dandruff that arises but PREEXISTING dandruff. Will it compromise the surgery in any way? While my case of dandruff is chronic, it isn't that severe. There aren't any dermatitis symptoms like scabbing, pus, or pruritus. I know we're advised to treat it aggressively prior to the operation, namely with anti-dandruff shampoos; however, I've done so with no noticeable improvement. I really don't think it'll clear up in time.