Granular stools may be caused by physiological reasons, such as drinking too little water, sedentary, etc.; or pathologic reasons, such as gastrointestinal tract dysfunction. 1. Physiological causes: (1) Drinking too little water: water will be reabsorbed in the intestines, if you drink too little water, it will cause the water content of the stool to drop too much, and the stool will become granular and difficult to discharge. (2) Sedentary: Sedentary activity is not enough, intestinal peristalsis is reduced, stools remain in the intestinal tract for a long time, and their water is excessively reabsorbed, which will lead to dry stools into granular. 2. Pathological reasons: gastrointestinal dysfunction can cause insufficient intestinal power, unable to discharge the stool in time, resulting in excessive reabsorption of water in the stool, resulting in dry and granular stools. There may also be other reasons for the granularity of stool, it is recommended to go to the hospital in time to improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.