My 3 month old son has recently begun to suck his thumb. I have been led to believe that when babies suck on their hands it is a sign of hunger. I have been watching him very closely so when he starts to suck on his thumb I will pick him up and try to nurse him to no avail. Is sucking his thumb going to negatively affect his nursing? He will still let me know when he is really hungry, right? If sucking his thumb is his way of letting me know he is hungry I am in trouble.. he is doing it more and more each day! Any advice on how to deal with this will be greatly appreciated!!