The other trouble which is frequently encountered immediately after treatment is again due to over-enthusiasm. Some patients cannot believe that they can eat fairly normally without regaining weight. They disregard the advice to eat anything they please except sugar and starch and want to play safe. They try more or less to continue the 500-Calorie diet on which they felt so well during treatment and make only minor variations, such as replacing the meat with an egg, cheese, or a glass of milk. To their horror they find that in spite of this bravura, their weight goes up. So, following instructions, they skip one meager lunch and at night eat only a little salad and drink a pot of unsweetened tea, becoming increasingly hungry and weak. The next morning they find that they have increased yet another pound. They feel terrible, and even the dreaded swelling of their ankles is back. Normally we check our patients one week after they have been eating freely, but these cases return in a few days. Either their eyes are filled with tears or they angrily imply that when we told them to eat normally we were just fooling them.
Source: Pounds and Inches by Dr. Simeons