When you're cutting, your body is in a calorie deficit. This means that even with extreme overeating, gaining a large amount of fat in a short period of time isn't as easy as it seems.

To gain 1 kg of fat, you need approximately 7,700 kcal over your normal calorie intake. Now imagine: to gain 3 kg of pure fat in a week, you'd need to overeat by approximately 23,000 kcal. That's about 3,000-3,300 kcal over your normal calorie intake EVERY day. For most people, this is very difficult, even with severe binge eating.

What actually happens when you overeat, especially fatty and salty foods:

First, water retention. Fatty, salty foods, and carbohydrates greatly affect your water balance. The body begins to retain water, and this easily adds 1-3 kg to your weight.

Second, glycogen. When you add carbohydrates, your muscles and liver fill up with glycogen. Each gram of glycogen holds about 3 grams of water. This adds weight.

Third, simply the volume of food. More food in your stomach and intestines means extra weight, which has nothing to do with fat.

So, of those 2-4 kg plus,
most of it is water and stomach contents
and only a small portion is actual fat.

Even with significant overeating, you'll typically gain about 0.5-1 kg of fat over the course of a week, not the 3-4 kg that the scale suggests.

The most important thing is not to panic. If you return to a normal diet and deficit, the excess water will disappear within a few days, and your weight will drop quickly.

The conclusion is simple: one bad period doesn't ruin your shape. What's far more dangerous isn't the breakdown itself, but the thought that "I've already broken down, so I can keep going."

Get back on track, and your body will quickly return to normal.