Any good ways to slowly stop my LO (now 22 months) from sucking his thumb? He usually will suck his thumb to sleep or for comfort (when crying ). If he is engaged in activities , he usually won't suck his thumb. But I want him to stop sucking his thumb completely

hahahah i had this trouble when my girl was cominf to 3 yrs old... but this chic rice aunty help me out... she actually tell an old folk tale... saying that if she doesnt stop sucking there would be worms .... she totally stop. i was so surprise.... for my boy... i told him better stop... cos when u go to sch... you wont look handsome to your girldfrens.... h3 stopped too.... at 18mnths