Constipation during weight loss may be caused by consuming too little fat, changing dietary habits and eating less, etc. It can be solved by adjusting diet, changing bowel habits or using medication. The details are as follows: 1. Adjust the diet: edible oil has a certain laxative effect, and the weight loss of the population fat food intake is reduced, which is likely to lead to constipation. In this case, you should adjust your diet and increase the intake of cooking oil appropriately. 2. Change the habit of defecation: people who lose weight usually eat too little, so the feces is also less, which leads to a reduction in the number of bowel movements. In this case, you should increase your food intake and cultivate good defecation habits by practicing defecation every morning, even if you have no desire to defecate, you can wait a little bit to form a conditioned reflex. 3. medication: if the symptoms of constipation is particularly serious, you should seek medical attention as soon as possible, under the guidance of the doctor to use Keseru, but also through the oral lactulose oral solution and other drugs to relieve symptoms. Weight loss period of constipation need to be under the guidance of the doctor for treatment, the adverse effects of drugs in a timely manner to avoid the development of the disease.