Bananas are not medicines and have no role in treating diseases, so eating bananas cannot cure constipation. Banana is a common food in life, which contains more nutrients. Bananas contain protein, sugar, vitamin C, vitamin A, dietary fiber, carbohydrates and other nutrients. Bananas contain a lot of dietary fiber, which is helpful for gastrointestinal tract movement after intake into the body. However, there are more causes of constipation, such as slow peristalsis of the gastrointestinal tract and organic lesions of the gastrointestinal tract, which may lead to a decrease in the number of bowel movements and difficulty in defecation. Banana is not a medicine and has no therapeutic effect on the above diseases, so it cannot cure constipation. It is recommended that patients with constipation go to the gastroenterology department of the hospital for examination to understand the causes of constipation, and then give appropriate medication or treatment through surgery to address the causes.