Can I drink hot milk tea when I have diarrhea?
Mar 12, 2025
Source: Cainiu Health
Dr. Shen Yonghua
Introduction
Milk contains lactose. In some individuals, during diarrhea, the activity of lactase in the intestines may decrease, leading to worsened lactose intolerance and making it difficult to completely digest lactose. Undigested lactose is broken down by bacteria in the intestine, producing gas and organic acids, which further irritate the intestinal tract, accelerate intestinal motility, and thereby exacerbate diarrhea symptoms, manifested as increased frequency of bowel movements and intensified abdominal pain.
Generally speaking, drinking hot milk tea is not recommended during diarrhea. The detailed explanation is as follows:
Milk contains lactose. In some individuals, during diarrhea, the activity of lactase in the intestines may decrease, worsening lactose intolerance and making it difficult to fully digest lactose. Undigested lactose is broken down by bacteria in the intestine, producing gas and organic acids, which further irritate the intestines, accelerate intestinal peristalsis, and consequently worsen diarrhea symptoms, such as increased frequency of bowel movements and more severe abdominal pain.
Milk tea contains ingredients such as caffeine and tea polyphenols. Caffeine has a certain degree of stimulatory effect and may activate the nerves of the gastrointestinal tract, promoting gastrointestinal motility. During diarrhea, the intestines are already in a state of accelerated peristalsis; consuming caffeine may further increase intestinal motility, which is unfavorable for the absorption of water and nutrients in the intestines, thereby exacerbating diarrhea.
Diarrhea can easily lead to body dehydration; therefore, patients need to replenish adequate fluids, such as warm boiled water or lightly salted water. They should consume bland, easily digestible foods, such as congee, noodles, and vegetable soup. These foods are easy to digest and absorb and will not burden the intestines further.
