My son is 19 months. He is a thumbsucker. He suck thumb when he feel sleepy, hungry and on seeing the picture on his dress which he hold on sucking his thumb. He is not eating well. All saying his thumbsucking habit make him doesn't like to eat. He is very low in weight. Can u please suggest how to stop his thumbsucking habit. I tried all the home remedies to stop but in vain. Even i tried thumbsucking nail polish which doctor prefer but he vomit when I applied that so I stopped using that so please tell a good way. And also some suggestions to make him eat and gain his weight. Thanks in advance.