Diarrhea after eating plums is usually considered to be caused by various factors such as bacterial enteritis, allergy and overdose. 1. Bacterial enteritis: Incomplete cleaning of plums or deterioration of fruit during storage and transportation. Consumption of unclean fruits causes bacterial enteritis and thus diarrhea. 2. Allergy: Some people are allergic to the substances in plums, and consuming plums may lead to gastrointestinal disorders due to allergies, and then patients may experience itchy skin with diarrhea and other digestive symptoms. 3. Excessive consumption: Although plums are delicious, excessive consumption may aggravate the burden on the gastrointestinal tract, which is prone to gastrointestinal dysfunction, leading to bloating, abdominal pain, diarrhea and other symptoms. It is recommended to consume clean and non-perishable fruits. If diarrhea is not relieved for a long time after consuming plums, please consult a doctor.