Weight loss will be constipated can not pull out may be due to diet unscientific, insufficient water, excessive exercise, and so on. 1. Diet unscientific: weight loss people often diet structure unscientific unreasonable, only eat a small amount of low-calorie food, reduce the intake of crude fiber food, such as fruits, vegetables, etc., resulting in constipation. 2. Insufficient drinking water: weight loss patients often do not drink enough water, is one of the causes of intestinal bowel discharge difficulties. 3. Excessive exercise: weight loss patients often exercise too much, resulting in insufficient body volume, such as a lot of sweat, but at the same time did not supplement enough water, which is also a very important factor in constipation. The symptoms of weight loss will be constipation can not be pulled out, we should go to the hospital in time to check and under the guidance of the doctor to treat, do not delay, in order to avoid the danger.