The content of starch and sugar in lotus root is very high, which is not conducive to digestion and absorption, and it is easy to produce gas, especially in patients with chronic gastritis, gastric ulcer and duodenal ulcer. It is difficult to digest lotus root with high starch content because of slow gastrointestinal peristalsis and insufficient gastric motility. Sugar in lotus root can also lead to excessive gastric acid secretion, stimulate gastric mucosa, aggravate gastric ulcer, and produce symptoms such as acid regurgitation, belching, abdominal distension and abdominal pain. Therefore, people with bad stomachs will lead to abdominal distension, while people with good stomachs should eat lotus roots in moderation, not too much at a time, so as not to cause indigestion and flatulence.