After eating lunch, I always pass gas in the afternoon.

Generally, flatulence is a normal physiological phenomenon in the human body. However, excessive flatulence may cause discomfort to oneself and those nearby. Frequent flatulence in the afternoon could be caused by factors such as improper diet, intestinal flora imbalance, or enteritis. Detailed explanations are as follows:

1. Improper Diet

Excessive intake of fats, sugars, and carbohydrates in the diet can overload the gastrointestinal system, leading to indigestion and the production of large amounts of gas, resulting in flatulence. In addition, stimulants such as caffeine and alcohol can irritate the gastrointestinal tract and contribute to increased gas release. It is recommended to maintain a balanced diet to help alleviate symptoms.

2. Intestinal Flora Imbalance

An imbalance in the gut microbiota can lead to poor digestion and excessive gas production, causing flatulence. Moreover, bacteria in the intestine produce gas when breaking down food. Patients may take medications such as lactasin tablets or live combined bifidobacterium and bacillus subtilis granules under medical guidance to relieve symptoms.

3. Enteritis

Enteritis caused by bacterial infection can impair intestinal digestive function, prolonging the retention time of food in the intestines and promoting gas formation, thereby leading to flatulence. Under a doctor's supervision, patients may use medications such as amoxicillin granules or levofloxacin tablets for treatment, which can help alleviate symptoms.

In addition to the above common causes, frequent flatulence might also result from conditions such as gastroenteritis, cholecystitis, or intestinal obstruction. It is advisable to seek timely medical evaluation to determine the underlying cause and receive appropriate treatment.