Gastroenteritis can lead to weight loss, mainly due to digestive disorders that cause obstacles in the digestion and absorption of food. But losing weight is not necessarily caused by gastroenteritis, there are many other reasons. 1. Gastroenteritis patients with different clinical manifestations, for nausea, vomiting, diarrhea and other symptoms of serious patients, may appear to lose a lot of weight, but often after the condition improves, strengthen the diet can be gradually recovered. 2. Of course, we can’t rule out the combination of other diseases leading to emaciation, such as the combination of tumors, tuberculosis and other consumptive diseases may also appear in the case of weight loss, mainly due to the increase in body consumption. Therefore, when the symptom of acute weight loss occurs, one should consult a doctor in time to clarify the cause of the disease and carry out treatment under the doctor’s guidance.