▁prevent ▁the ▁formation ▁of ▁nod ules . ▁Tob acco , ▁alco hol , ▁certain ▁medic ations , ▁and ▁recre ational ▁dru gs ▁have ▁also ▁been ▁imp licated ▁in ▁path ologies ▁of ▁the ▁vocal ▁fol ds . ▁Red uc ing ▁expos ure ▁to ▁these ▁subst ances ▁has ▁been ▁shown ▁to ▁reduce ▁one ' s ▁risk ▁of ▁nod ules . ▁Other ▁behav i ours ▁that ▁are ▁imp licated ▁in ▁vocal ▁fol d ▁nod ules ▁include ▁poor ▁sleep ing ▁hab its ▁and ▁poor ▁nut r ition . ▁ ▁Tre at ment ▁The ▁two ▁main ▁methods ▁of ▁tre ating ▁vocal ▁fol d ▁nod ules ▁are ▁voice ▁ther apy ▁( a ▁behaviour al ▁treatment ) ▁and ▁l ary n ge al ▁mic ros urg ery ▁( a ▁surg ical ▁treatment ). ▁Because ▁of ▁general ▁ris ks ▁of ▁surg ery ▁( e . g . ▁scar ▁formation , ▁or ▁those ▁pos ed ▁by ▁general ▁an est hes ia ), ▁behaviour al ▁treatment ▁is ▁usually ▁recommended ▁first . ▁ ▁Be hav iour al ▁treatment ▁ ▁Be hav iour al ▁voice ▁ther apy ▁is ▁typically ▁carried ▁out ▁by ▁speech - language ▁path olog ists . ▁While ▁behaviour al ▁treat ments ▁methods ▁vary ▁greatly , ▁they ▁are ▁generally ▁effective ▁at ▁impro ving ▁vocal ▁quality ▁and ▁decre asing ▁size ▁of ▁vocal ▁fol d ▁nod ules . ▁Complete ▁resolution ▁of ▁nod ules ▁through ▁behaviour al ▁treatment ▁is ▁possible ▁but ▁unlikely . ▁ ▁Be hav iour al ▁techniques ▁can ▁be ▁indirect ▁or ▁direct . ▁Ind irect ▁approaches ▁focus ▁on ▁impro ving ▁vocal ▁h yg iene