Flatulence after drinking beer is considered to be related to beer, followed by dietary causes (e.g. consumption of greasy food, stimulating food), and finally disease causes (e.g. chronic gastritis, reflux esophagitis, peptic ulcer, stomach tumor). 1. Beer causes: Beer contains a certain amount of gas, and drinking too much of it can lead to symptoms such as flatulence and hiccups. Alcohol in beer can also irritate the gastric mucosa, leading to abnormal digestion and peristaltic function. 2. Dietary reasons: such as eating greasy, stimulating food can lead to abnormal digestion and peristaltic function of the stomach, resulting in bloating, vomiting, hiccups and other symptoms. 3. Disease causes: such as chronic gastritis can also have acid reflux, stomach pain and other symptoms; such as reflux esophagitis can also have acid reflux, retrosternal pain and other symptoms; such as peptic ulcer can also have periodic, rhythmic stomach pain; such as stomach tumors can also have appetite loss, weight loss and other symptoms. There are many reasons for flatulence after drinking beer. If the flatulence after drinking beer persists without relief, it is recommended to consult a doctor for a clear diagnosis and symptomatic treatment.