Weight loss with increased fat rate may be related to a variety of factors such as disease and weight loss. 1. When the human body suffers from trauma, bone fracture, or after surgery, because of the long-term restriction of activities, resulting in muscle atrophy, coupled with over-nutrition, it is very easy to cause weight loss and increased fat rate phenomenon. After the body damage slowly recovered, you can carry out appropriate exercise, after a period of time can be restored to the normal state. 2. Using inappropriate dieting methods in the process of weight loss, after aerobic exercise, without reasonable planning of diet, intake of desserts, fried chicken, doughnuts and other high-calorie foods, may lead to weight loss and increase in fat rate. In addition, long-term dieting without timely replenishment of nutrients needed by the body can also lead to this situation. Therefore, weight loss should be accompanied by reasonable exercise and low-fat, filling and nutritious food. In conclusion, in our daily life, we should develop good habits, strengthen exercise, and maintain stable body fat. If there is weight loss and fat rate increases, it is recommended to go to the hospital in time.