Stool without occult blood but is the front part of the black and hard, is a normal phenomenon, mostly due to fecal accumulation, water absorption caused by the phenomenon of fecal dryness. People who do not have occult blood symptoms through fecal examination indicate that there is no bleeding in the gastrointestinal tract, and the fecal occult blood test can be used to exclude digestive bleeding diseases, such as chronic gastritis, chronic intestinal inflammation, gastrointestinal tract tumors and other diseases. While there is no occult blood in the stool, but the front part of the stool is black and hard, which is a normal phenomenon. When the water in the stool is absorbed by the stomach and intestines, the front part of the stool is black and hard, and the back part of the stool can be restored to the normal state. It is recommended that the proportion of fresh vegetables and fruits, such as apples, bananas, tomatoes, etc., in the daily diet to alleviate this phenomenon. At the same time, it is recommended to consume sufficient amount of water every day and maintain proper exercise.