1, pear, peach, banana, orange, citrus, watermelon, melon, sugar cane, water chestnut, etc.. These fruits are generally cold, with the effect of heat and laxative, can directly stimulate the intestinal tract, increase intestinal peristalsis, but also contains a variety of vitamins and a large amount of fiber, and vitamins and fiber have the role of preventing constipation. 2, cucumber, carrots, tomatoes and the above-mentioned fruits are similar, raw food also has a better laxative effect. 3, apples because of the tannic acid, but sometimes not conducive to constipation. The cinnamon is warm and hot, which can also cause constipation in people with high fire energy. Vegetables containing more fiber include fungus, silver fungus, shiitake mushrooms, kelp, bok choy, mullein, pumpkin, etc.; nuts containing more oil include pecans, sesame, melon seeds, etc., which are also beneficial to the prevention and treatment of constipation.