#asktheexpert my daughter is 5months whole day either she sucks her thumb or puts her hand in her mouth. Even will sleeping she sucks the thumb and sleep. Many people are saying me not to let her suck her thumb or it will become habit and she will do the same even when she grows. I am worried because I whnever i try to take her hand or thumb out of her she becomes fussy and cries. Should i stop her doing that? Will it become s habit of hers?