Stool not shaped and feel a layer of oil may be improper diet, gastrointestinal dysfunction, acute gastroenteritis and other disease factors, but also may be caused by drug factors, need to adjust the diet under the guidance of the doctor, targeted treatment, to drug therapy, such as bifidobacteria, montelukast and so on. 1. Improper diet: If you eat too much greasy, high-fat food, resulting in high fat content in the body, you may have unshaped stools and stools with oil. After adjusting the diet, it can usually be self-cured. 2. Drug factors: taking orlistat can cause fatty stools and unformed stools, which can be recovered after stopping the medication, without special treatment. 3. Disease factors: gastrointestinal dysfunction, acute gastroenteritis can cause digestive dysfunction, resulting in unshaped stools with layers of oil. Gastrointestinal dysfunction can be treated with probiotics, such as Bifidobacterium bifidum and Bacillus licheniformis, and those with diarrhea can use loperamide to stop the diarrhea. Acute gastroenteritis with bacterial infection can be treated with ciprofloxacin, and those with severe diarrhea can use montelukast to stop the diarrhea. Stool not shaped and feel a layer of oil, may be other reasons, such as biliary obstruction, chronic pancreatitis, endocrine system diseases, etc., if the symptoms continue to be unrelieved it is recommended to go to the hospital, to clarify the cause of the disease, symptomatic treatment.