कभी कभी बच्चों में अंगूठा चूसने की आदत हो जाती है इस आदत को कैसे छुडवा येchild-psychology Corner
It is normal for babies to suck their thumbs. They do it to soothe themselves or when they are bored, sick or need attention. Hence observe when he does it. Most babies will overcome the habit within a year. Once he crosses the age of 1 you can begin breaking the habit. Here's the link https://www.parentune.com/parent-blog/thumb-sucking-9-tips-to-tackle-it/1209 I hope these give you some ideas.