I'm a hair stylist with a client who came in recently complaining her scalp itched horribly.Upon examining her scalp i found that it was ALL flaking off!some in nickle size flakes.i applied an oil scalp treatment,shampooed twice,then applied 4 different conditioning treatments,blow dried,then flat ironed to then find the scalp was producing the flakes again.She has a history of drug use.could this be caused by crystal meth?