The methods to eliminate large stools at night are as follows:

1. Eat dragon fruit: Dragon fruit is rich in fiber and has a high water content, which can promote bowel movement after entering the gastrointestinal tract. Gastrointestinal peristalsis and increasing the water content of feces are beneficial to defecation.

2. Konjac: Konjac contains more konjac polysaccharides, which can be better absorbed by the intestines, and is conducive to accelerating gastrointestinal peristalsis, and generally can help defecation.

3. Spinach: Spinach is a common vegetable that can moisturize and relieve constipation. It also contains a large amount of plant crude fiber, which can speed up intestinal peristalsis and expel feces.

4. Celery: Celery is rich in dietary fiber, which can speed up gastrointestinal motility and help defecation. It also contains pectin, which can remove gastrointestinal garbage from the body.

The reasons why the body excretes stool:

After eating, the human stomach will begin to digest food and transport it to the small intestine, which can absorb nutrients such as protein, fat, and glucose in the food. It is absorbed into the blood through the intestinal mucosa and then enters the human blood circulation. The remaining food residues enter the large intestine, which will absorb the water in the food residues again, form feces through intestinal peristalsis, and then be excreted from the body.

The process of expelling waste products from the body after cellular metabolic activities is called excretion. The respiratory system exhales gases, the urinary system excretes urine, and the skin excretes sweat. Food residues after digestion and absorption of food entering the digestive tract form feces and are excreted from the body through the anus. They do not participate in the metabolic activities of cells and are not metabolites. They are excreted from the body and are called elimination.