Thick stools in the front and thin stools in the back may be a normal physiological phenomenon, or it may be caused by occupational lesions of the large intestine and other disease factors. 1. Physiological phenomenon: stools are usually stored in the large intestine before excretion, and prolonged storage can cause dehydration, dryness and enlargement of stools, which can lead to the appearance of thick stools in the front and thin stools in the back. 2. Pathological factors: when there are colorectal mucosal fibroma, colorectal cancer and colorectal polyps and other occupying lesions in the large intestine, the local occupation of the intestinal tract can cause narrowing of the intestinal lumen and intestinal blockage, which can lead to obstruction of excretion of stools, and then there are thick stools and thin stools in front and behind, accompanied by abdominal pain, bloody stools, difficulty in defecation and other symptoms, which need to be promptly referred to a doctor for diagnosis and treatment. When the stool is thick in the front and thin in the back, it is recommended that the patient consult a doctor in time, and under the guidance of a specialized doctor, actively carry out the appropriate treatment, which will help to cure the disease as soon as possible.