Thanks a lot my dear. Your answer really helped..
I really appreciate it..
Wishing you all the very best,
Regards
This is really common for kids to have and can be comforting to them, particularly before falling asleep. It’s not something to worry about in itself, but the main concern is his long-term tooth health.
Be reassured that most kids will grow out of this with no intervention. You may want to try introducing some alternative bedtime comforting habits for him: singing, playing a game, giving him a stuffed animal, or some other ritual.
He’s four, so may also be old enough to understand some of the reasoning behind why you don’t want him to suck on his thumb - you could try explaining it to him.
But don’t worry too much, he will likely outgrow it soon!