(1) The apple infected by bacteria can't be washed cleanly. Enteritis or bacillary dysentery may occur after eating food contaminated by bacteria such as Escherichia coli, Salmonella, Shigella, etc., or after drinking drinks contaminated by bacteria, and symptoms such as abdominal pain, diarrhea, vomiting, acute diarrhea, and fever may occur to varying degrees.

(2) Food retention and indigestion, irregular diet, overeating, eating indigestible food, or food retention in the stomach due to insufficient gastric motility, causing abdominal distension, diarrhea, nausea, vomiting, acid regurgitation, heartburn, belching and other symptoms.

(3) Cold food likes to eat cold food and often drinks cold beer, which can lead to gastrointestinal dysfunction, accelerated intestinal peristalsis and diarrhea.

(4) Food poisoning is an acute toxic disease caused by eating food contaminated by bacteria and their toxins, or eating uncooked lentils. Deteriorated food and polluted water sources are the main sources of infection, and unclean hands, tableware and flies with bacteria are the main routes of transmission. Patients may have vomiting, diarrhea, abdominal pain, fever and other acute gastrointestinal symptoms.