Unshapely stools for 10 years may be caused by digestive disorders or may be due to indigestion and other causes. You can take probiotics to improve it, and you should also seek medical attention to identify the cause. 1. Digestive system diseases: colorectal tumors, inflammatory bowel disease and other digestive system diseases can lead to long-term unshaped stool. You should pay attention to whether 10 years of unformed stool is accompanied by other symptoms. If there is blood in the stool, increased frequency of stool, abdominal pain, abdominal distension, reduced food intake, weight loss, etc., it is recommended that the hospital improve the fecal routine, colonoscopy, etc., to identify the cause of the disease, and treatment under the guidance of the doctor. 2. Indigestion: weakened digestive function can also lead to unformed stools, but there is no blood in the stool, abdominal pain and other symptoms. It is recommended to take oral probiotics such as Bifidobacterium triplex tablets. If you have symptoms of prolonged failure to form stools, you should consult a doctor in time to complete the examination, identify the cause of the disease and treat it.