Honestly, I chuckled up when I saw the sudden increase in weight. But, it was for a reason that her weight increased.
Forcing yourself to lose or gain weight can be harmful to your health.
Maintaining a healthy diet is important.
Suddenly deciding to go on a diet and skipping on meals, might be bad for your body. Your body is used to the way you take in food, and you can fall ill due to sudden change in it. So, instead of taking harmful steps like that, make your body get use to it drastically. Changes don't occur in an instant.
I am no health expert but, precautions should be known by everyone.