Gastroenteritis will lose weight may be related to the symptoms of gastroenteritis, their own anxiety. 1. Symptoms of gastroenteritis: gastrointestinal symptoms are mainly manifested as nausea, vomiting, diarrhea, dyspepsia, belching, etc. These symptoms on the one hand, is not conducive to their own digestion and absorption, thus leading to thinning; on the other hand, the symptom of early satiety, which will make their own loss of appetite, the amount of food is also less than usual, a little bit of satiety, nutritional deficiencies caused by thinning. 2. Patient anxiety: due to gastroenteritis brought about by the symptoms will make themselves in a bad mood, mental tension, emotional tension, anxiety, and thus thin. If discomfort occurs, it is recommended to consult a doctor in a timely manner, under the guidance of a doctor to clarify the cause and targeted treatment, do not take medication on your own to avoid delaying the condition.