Can be the same as in infants. Others include, coughing, gagging, vomitting into mouth or outright, frequent night waking, snoring, congestion, frequent hiccups, bad breath, poor appetite, FTT, tooth decay, respiratory problems, talking about stomach aches, throat or mouth pain, hurting in the mouth/throat/stomach, etc. My daughter used to talk about disliking “soup” when she was much younger. It took me a while to figure out that was what she called the reflux that came up into her mouth that she swallowed back down.