My 4 month old son always suck his hands fingers ,even after feeding him. I m afraid of that later on he will suck his thumb? I dont know how to deal with it

HI, Most of the babies do this. Probably it gives them comfort. Do not worry, with passing days, he will stop doing on its own. I do not think you will have to do anything as in take any measure to stop that. You know, how it happens, at some phases babies cry whole night then they stop on their own, sometimes they do not drink as much milk, etc., and how all things disappear as if these problems were never there. He is just four months and he would not be distracted by things unless you sit beside him and keep showing him things. Yes, making him wear mittens is a good idea.