Can patients with acute gastroenteritis eat watermelon?

May 09, 2025 Source: Cainiu Health

Dr. Yu Yongchao

Introduction

Patients with acute gastroenteritis are not advised to eat watermelon during the course of their illness. Watermelon has a certain laxative effect, and its dietary fiber can stimulate intestinal peristalsis. In patients with acute gastroenteritis, intestinal peristalsis is already increased; further stimulation from watermelon may accelerate peristalsis even more, which is detrimental to the healing of the intestinal mucosa and may worsen diarrhea symptoms.

Generally, patients with acute gastroenteritis are not advised to eat watermelon during the course of their illness. Detailed explanations are as follows:

Watermelon has a certain bowel-relieving effect, as its dietary fiber can stimulate intestinal motility. Patients with acute gastroenteritis already have increased intestinal motility; if further stimulated by watermelon, the intestinal motility may accelerate further, which is not conducive to the healing of intestinal mucosa and may worsen diarrhea.

The gastrointestinal tract of patients with acute gastroenteritis is in a state of congestion and edema, with weakened digestive function. Watermelon contains a large amount of water and dietary fiber, which may increase the burden on the gastrointestinal tract after consumption, potentially worsening symptoms such as abdominal pain and diarrhea. Patients with acute gastroenteritis often experience vomiting and diarrhea, which can easily lead to electrolyte imbalance. Watermelon contains a significant amount of sugar and water; excessive consumption may dilute the concentration of electrolytes in the body, further exacerbating the electrolyte imbalance.

During an acute episode of gastroenteritis, patients should choose bland, easily digestible foods, such as rice porridge and noodles, to reduce the burden on the gastrointestinal tract and aid in the recovery of gastrointestinal function. Once the condition improves and symptoms subside, patients may try consuming small amounts of watermelon based on their individual conditions, but should carefully monitor their body's response. If discomfort occurs, consumption should be stopped immediately.

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