Scientific fat gain is a method, first of all, we should pay attention to eat more high-calorie, high-protein, high-fat food, increase the number of meals, three meals a day into four meals a day or five meals a day. At the same time, we should pay attention to increase sleep, not only to nap, and every night to strive to go to bed before 10:00, and sleep a full 8 hours a day. In addition to diet and sleep, you can also take herbs that strengthen the spleen, such as Atractylodes, Poria, Licorice, Astragalus, and Angelica. These medicines can effectively improve the function of the spleen and stomach, making a person stronger, and can increase weight for a healthier person. In addition, it is also necessary to increase calories appropriately, increase resistance exercise, and reasonably increase body weight, which can also achieve the effect of scientific weight gain.