Common ways to increase weight are to increase food intake, ensure adequate sleep, and proper exercise. 1. Increase food intake: to increase body weight, must provide the body with a variety of nutrients needed, diet should be diversified, can be more moderate to eat more food containing fat and protein, but also eat more carbohydrate-containing food, such as, steamed bread, rice and so on. So that excess calories will be converted into fat and stored in the subcutaneous tissue. 2. Ensure adequate sleep: adequate sleep is conducive to improving the body’s metabolism, but also to promote the digestion and absorption of food. 3. Conduct appropriate exercise: moderate exercise every day can promote appetite, but also can make the muscles stronger and increase weight. By increasing the amount of food, adequate sleep, the body will gain weight, but gradually, do not overeat, is the body fat rate and BMI index within the normal range.