The main symptoms of protein indigestion are distention and pain in the stomach and abdomen or belching in the stomach, loss of appetite, nausea, vomiting, bad breath and, in another case, other mental symptoms. Distention and pain in the stomach and abdomen is a Chinese medical term that mostly occurs after a meal or is aggravated after a persistent meal, and is one of the common symptoms of dyspepsia, in is belching in the stomach. Belching is the sound made when gas or acidic liquid rising from the stomach goes upstream. In indigestion, belching often has an unpleasant sour smell, which is mainly caused by the stomach not emptying on time and food gathering for too long. Another type is loss of appetite, which usually occurs because the stomach is not emptying food and the intestines do not signal hunger, so there is no appetite and loss of appetite. Another is nausea and vomiting, indigestion, because of gastrointestinal discomfort, often accompanied by stomach acid reflux nausea, some serious will also appear vomiting, often occurs in patients with significantly delayed gastric emptying, vomiting mostly when the meal, stomach contents. Another is bad breath, when indigestion, the deposition of food waste in the intestines will produce heat, producing foul gas evaporates upward, through the mouth and nasopharynx to form bad breath. Other symptoms will mainly be abdominal discomfort, which will affect the discomfort, and there will be symptoms of anxiety insomnia in concentration.