Dizziness and loose stools may be caused by mental factors, gastroenteritis, ulcerative colitis and intestinal cancer. 1. Mental factors: frequent tension, anxiety and stress can lead to autonomic nerve disorder and dizziness; it also affects the function of gastrointestinal peristalsis, which can lead to unformed stools. 2. Gastroenteritis: Eating bacterial infected food can trigger gastroenteritis, resulting in unformed stools, dizziness and other symptoms. 3. Ulcerative colitis: manifested by unformed stools, frequent bowel movements, diarrhea can cause electrolyte disorders, which can also lead to dizziness and other symptoms. 4. Bowel cancer: the infiltration of cancer cells into local intestinal tissues may lead to symptoms such as unformed stools, mucous blood stools, dizziness and weight loss. The above symptoms may also be related to other causes, so it is suggested that patients should seek medical treatment as soon as possible to find out the causes of the disease under the guidance of professional doctors and treat them as soon as possible.