The reasons for always wanting to poop when lying down to sleep at night are hemorrhoids, anal swelling, constipation, fecal residue, and gastrointestinal dysfunction, as follows: 1, hemorrhoids: hemorrhoid congestion thus causing a sense of irritation, making people always feel like pooping; 2, fecal residue: stimulation of the tiny little nerves near the anus and the muscle tissue around the anus. You can take laxative and laxative drugs to keep bowel movements smooth; 3, constipation: symptoms can be improved by changing the diet; 4, inflammation causing anal swelling; 5, disorders of gastrointestinal function; it is recommended that you can take oral medication first, and if it is not relieved, you need to go to the hospital for treatment.