Formed but loose stools may be normal, but they may also be abnormal. Normal phenomenon is due to the body’s normal metabolism, excretions contain bile, pancreatic fluid or gastric juice; abnormal phenomenon is mainly due to gastrointestinal tract erosion, tumors, hemorrhoids, and acute enteritis. 1. Normal phenomenon: banana-like soft stools, dark yellow or yellow-brown in color, is due to the normal transformation of the body of food through the gastrointestinal digestion, absorption, fermentation and the formation of which contains the presence of bile, pancreatic or gastric juices, which will lead to the formation of stools, but relatively loose. 2. Unusual phenomenon: the appearance of this form of stool and accompanied by a small amount of bleeding symptoms, mostly considered to be the gastrointestinal tract erosion or occupational lesions; if the appearance of this form of stool, reddish-brown in color, accompanied by blood clots, can not be excluded from hemorrhoids or tumors; if the appearance of this form of stool accompanied by a significant increase in the number of bowel movements, can not be ruled out as a result of acute enteritis. If the patient appears to be shaped but loose, it is recommended to go to the hospital in time for the relevant routine stool and occult blood test, to clarify the specific causes of the disease, and then symptomatic treatment.