The symptoms of gastroparesis can include pain in the middle of the upper abdomen, feeling bloated after eating, feeling full after eating only a small amount of food, and nausea.* It's apparantly common in diabetics, but there is idopathic gastroparesis, which basically means the doctors have no idea why you're having it. Some people can also get it after a round of viral gastroenteritis. I guess they diagnose it with a gastric emptying scan. They time how long it takes for 1/2 of a radioactive substance to empty from the stomach. If it's longer than an hour, most likely you have gastroparesis. It's more common in women under 40 yrs old so some doctors suspect that progesterone may play a role. In the case of a baby, I haven't a clue. Poor thing. I get it on and off and it isn't very fun.*got the info from the book Gastrointestinal Health by Steven R Peikin, MD