The color of the front and back part of the stool is different due to constipation and dietary problems. Some people have constipation, and the stool of these people stays in the intestinal system for a longer period of time or even becomes persistent stool, so the color of the stool will be darker. The first half of the stool is mainly dark in color, while the second half is normal in color. Constipated people can eat more coarse fiber food to regulate, the color of food will also have an impact on the color of the stool, some people will eat darker colored food, such as animal blood, animal offal, etc., the color of such food will be darker after being digested by the body, while other food on the color of the stool will cause it to be lighter, two kinds of food in succession after eating the procedure will lead to the color of the stool is not the same. The color of the stool will be different after the two foods are eaten in sequence.