Stomach acidity from drinking millet porridge is usually caused by chronic gastritis, gastric ulcer, reflux gastritis and other diseases. Millet porridge is a coarse food, which is rich in B vitamins and various nutrients, which can reduce the burden of the digestive system and protect the gastric mucosa. However, the dietary fiber content in millet is relatively high, and dietary fiber has the effect of stimulating the secretion of gastric acid, especially people who suffer from stomach disorders themselves, will be more prone to stomach acid reflux symptoms. Secondly, some people suffering from chronic gastritis disease will stimulate increased secretion of gastric acid when eating high-fiber foods, thus leading to symptoms of gastric acidity. In addition, some people have gastric ulcers in their digestive system, and when they eat high-fiber foods, the excessive secretion of gastric acid can cause stimulation of the ulcer surface, which can lead to not only stomach acid, but also stomach pain in some people. In addition, patients with reflux gastritis may suffer from acidity after eating millet porridge because of excessive secretion of gastric acid, thus causing burns to the esophageal mucosa and thus causing symptoms of gastric acidity.