This is not normal because you don't have a normal diet or exercise. When you resume your normal eating activities, your weight will return to its original weight. At present, the weight is only, but most of it is water and food. If you lose weight by dieting, over time, some of your nutrition will not keep up, and you will consume some of your protein.

If you want to lose weight, this method is not recommended. Controlling diet is only part of losing weight, but it must be combined with some exercise and work and rest.

Three points depend on exercise and seven points on eating. If you eat, you must pay attention. It is low in fat, sugar and salt. Cereals, protein vitamins, fibers, etc. It should be reasonably matched according to the pyramid model, and the intake should be reasonably reduced, and the staple food cannot be skipped.

I can only tell you so much in a simple and understandable way. Well, I won't tell you if it's too abstruse. I have learned some professional knowledge about English, so I suggest you eat normally and exercise more if you want to lose weight.