Diarrhea can be caused by dietary factors, acute poisoning, digestive diseases, systemic diseases and other factors. 1. Dietary factors: women eat some unclean food, it will lead to diarrhea, may also be accompanied by abdominal pain, nausea, vomiting, and so on. 2. Acute poisoning: for example, puffer fish, fish guts, lead, phosphorus and other substances, may cause acute poisoning, women will have diarrhea, may also be accompanied by weakness and vomiting and other symptoms. 3. Digestive system diseases: for example, ulcerative colitis, irritable bowel syndrome and other diseases, may cause women to have diarrhea, may also be accompanied by abdominal distension, abdominal pain, fatigue, nausea and vomiting and other symptoms. 4. Systemic diseases: women with prolonged diarrhea may also be associated with some systemic diseases, such as hyperthyroidism, systemic lupus erythematosus and so on. When a woman has diarrhea for a long time and is accompanied by other obvious abnormalities, it is recommended that she consult a doctor for appropriate examination and treatment to avoid serious complications.