1. Staying up late, partial eclipse and excessive exercise can easily lead to thinness. 2. Family thinness can also cause thinness, and some people will not get fat until middle age. People in Guangdong and Fujian like to drink soup before meals, so it is not easy to get fat even if they eat too much. If you think too much on weekdays, it is also the reason for being thin. It is suggested that you can gain weight only after analyzing the reasons according to your own situation, but not every kind of thinness can be solved. Also, if you just lose a little weight, everything else is fine, so don't worry too much. This is mainly because of your physical condition. If you really want to gain weight, it is best to supplement digestible food after moderate exercise and try not to stay up too long at night. It's important to form good habits of work and rest. Maintenance method: 1. Proper exercise is to increase appetite. 2. Eat less and eat more meals instead of increasing the amount of food per meal. Choose nutritious foods, that is, foods rich in vitamins, minerals and calories. You are underweight because you can't get all the vitamins and minerals your body needs, especially iron. You must eat a lot of foods with high nutrition, low cholesterol and low unsaturated fatty acids, such as lean meat, fish, low-fat dairy products, fruits, vegetables and bean products, supplemented by high-calorie foods (such as sweets) and high-fat foods (such as margarine). Eat whatever you want, not just for "necessity". Don't just eat dessert (such as ice cream, milk, cake, etc.). ), you should eat more ordinary food, such as sesame cake, cheese, raisin bread, cream and so on. As long as it suits your taste, whether it's chewing, smoking, cold, hot or creamy, as long as you like it, just enjoy it. 4. The secret of eating high-calorie food. Skim milk powder with juice, sandwiches with butter, pork floss, fried ribs with two spoonfuls of cream can all consume more calories. You can also choose high-calorie foods and mix high-calorie and low-calorie foods, such as tortillas with coffee or tea. 4. imitate the skills of dieters, but use them in reverse. For example, put ready-to-eat food or snacks at home, school or office. Put some raisins, walnuts or snacks in the glass jar; Put some cheese and ice cream in the refrigerator; Put some ready-to-eat fruits in the basket on the dining table; Put some chocolate, walnuts, potato chips, biscuits, etc. In your wallet, you can eat at any time. Pay more attention to your oral health. Eat more snacks and pay more attention to your oral hygiene. You must brush your teeth and rinse your mouth more often than usual. Eat less sticky sweet 1. Take proper exercise to increase appetite. 2. Eat less and eat more meals instead of increasing the amount of food per meal. Choose nutritious foods, that is, foods rich in vitamins, minerals and calories. You are underweight because you can't get all the vitamins and minerals your body needs, especially iron. You must eat a lot of foods with high nutrition, low cholesterol and low unsaturated fatty acids, such as lean meat, fish, low-fat dairy products, fruits, vegetables and bean products, supplemented by high-calorie foods (such as sweets) and high-fat foods (such as margarine). Eat whatever you want, not just for "necessity". Don't just eat dessert (such as ice cream, milk, cake, etc.). ), you should eat more ordinary food, such as sesame cake, cheese, raisin bread, cream and so on. As long as it suits your taste, whether it's chewing, smoking, cold, hot or creamy, as long as you like it, just enjoy it. 4. The secret of eating high-calorie food. Skim milk powder with juice, sandwiches with butter, pork floss, fried ribs with two spoonfuls of cream can all consume more calories. You can also choose high-calorie foods and mix high-calorie and low-calorie foods, such as tortillas with coffee or tea. 4. imitate the skills of dieters, but use them in reverse. For example, put ready-to-eat food or snacks at home, school or office. Put some raisins, walnuts or snacks in the glass jar; Put some cheese and ice cream in the refrigerator; Put some ready-to-eat fruits in the basket on the dining table; Put some chocolate, walnuts, potato chips, biscuits, etc. In your wallet, you can eat at any time. Pay more attention to your oral health. Eat more snacks and pay more attention to your oral hygiene. You must brush your teeth and rinse your mouth more often than usual. Eat less sticky sweets. Food.