Personally, I think it's normal to gain a few pounds after eating in a short time. Just eating a meal is several pounds of food. Therefore, there is a difference of several kilos between weighing before and after meals.

If you control your diet and go to the gym every day, your so-called fat will be reduced. But to keep fit, exercise and diet control is a long-term thing, and this process is relatively difficult. This is a good thing to test your patience and perseverance.