Wanting to poop before fainting may be related to vertigo syndrome, acute gastroenteritis, gastrointestinal bleeding and other diseases. 1. Vertigo syndrome: a disease caused by inner ear and vestibular cerebellar lesions due to vestibular neuritis, cerebral ischemia and other factors, patients will experience autonomic dysfunction, dizziness, nausea and vomiting, and wanting to poop symptoms. 2. Acute gastroenteritis: mostly caused by pathogens infecting the mucosa of gastrointestinal tract due to unclean food and drink, patients can suffer from diarrhea, vomiting, fever and other symptoms that cause dizziness and make patients feel like having a bowel movement before fainting. 3. Gastrointestinal bleeding: If the patient suffers from peptic ulcer, gastroenteritis, gastrointestinal tumors and other diseases, the patient will experience abdominal pain and diarrhea, nausea and vomiting, etc. When accompanied by gastrointestinal bleeding, the patient will experience a decrease in blood volume due to gastrointestinal hemorrhage, which will lead to dizziness and the feeling of wanting to have a bowel movement before fainting. In addition, cardiac diseases such as arrhythmia, coronary heart disease, myocardial infarction, and physical weakness such as low blood pressure, low blood sugar, and over exertion will also cause the symptom of wanting to have a bowel movement before fainting. When patients want to poop before fainting, it is recommended to seek timely medical treatment to identify the cause of the disease and carry out targeted treatment to avoid delaying the condition.