Diarrhea, also known as diarrhea, can be associated with both intestinal and stomach disorders. The causes of diarrhea are relatively complex, and disorders of the intestines or stomach can lead to this symptom. Diseases such as intestinal bacterial infections, parasitic infections, irritable bowel syndrome, intestinal malignancies, radiation enteritis and advanced gastric cancer, and chronic atrophic gastritis can trigger diarrhea. In addition to this, diarrhea can be associated with climatic influences, dietary influences and other factors such as chronic pancreatitis, cholelithiasis, scleroderma and hyperthyroidism. The symptoms of diarrhea alone can not diagnose the specific cause of the disease, it is recommended that patients seek medical examination as soon as possible to determine the cause of the disease, and follow the doctor’s instructions for treatment.