Don't deliberately gain weight just to gain weight. For example, it is wrong to eat more and exercise less, especially at night, which is not good for the stomach.

You can exercise more and eat more. You can go to the gym to exercise. A little muscle, you won't look so thin.

Staying up late is not good, and staying up late is easy to make thin people thinner. Because I answered your question at this point, I am very thin. . . . . .