Constipation affects body weight, and long-term constipation can lead to weight loss. Long-term constipation patients are prone to bloating and indigestion, bloating will lead to loss of appetite and thus cause a reduction in food intake, indigestion will obviously affect the patient’s absorption of nutrients in food, when there is not enough nutrients to provide sufficient energy for the human body over a long period of time will lead to weight loss or even weakness, emaciation. For the above situation, it is suggested that patients should eat more fruits and vegetables and dietary fiber-rich foods such as apples, bananas, kiwi, spinach and other foods that can lubricate the intestinal tract and promote intestinal defecation. Many constipated patients also lose weight due to long-term emotional anxiety, excessive tension, lack of sleep, irregular diet and other factors. Patients with constipation need to adjust their diet and appropriate exercise to improve constipation and avoid affecting their weight, and patients with serious conditions should go to regular hospitals for examination in time and follow the doctor’s instructions for appropriate treatment.