First of all, we should increase our dietary intake, gain weight, and provide the body with all kinds of nutrients needed to synthesize tissues. Diet should be rich and varied, not picky eaters, not partial eclipse. Protein should eat more foods rich in fat and carbohydrates (starch, sugar, etc.) when it has sufficient intake. In this way, excess energy can be converted into fat and stored under the skin, enriching and thinning. Secondly, we should keep enough and good sleep. If people get enough sleep, their appetite is better, which is also beneficial to the digestion and absorption of food. In addition, exercise properly. Especially for people who sit in the office for a long time, taking some time to exercise every day will not only help to improve their appetite, but also make their muscles stronger and stronger. If the muscles of the human body do not exercise for a long time, they will be "used in and wasted", and the muscle fibers will contract and weaken relatively, making people look thin.