Gained 1kg overnight ?

[Charliebear19]

Hello, I've been lean bulking since January gaining about 200 grams a week. Went from 65kg to now just over 68kg.
A couple of weeks ago my main lifts started stalling so I added an extra 100 calories a day to my diet from 2900-3000.
That first week of adding 100 extra calories all my lifts started going up again, but my weight for the week didnt go up and stayed the same.

However this week, I apparently gained 1kg overnight 68.8kg-69.8kg and it's been there for 2 days and hasn't gone up or down ?? What would cause this ? I don't think an extra 100 calories a day would cause that much weight gain overnight considering the first week I added more Calories my weight stayed the same.. I've been eating the exact same foods daily and weighing it all out ect and weighing myself daily and getting the weekly average.

Went from gaining 200 grams a week, to nothing for a week, to 1kg overnight and it not dropping down after 2 days.

Damn all this bodybuilding stuff can get stressful.

[Charliebear19]

3 days later and still at 69.8kg so it hasn't moved. Where would the 1kg weight gain come from and why hasn't it moved ??

[Ruckiwerh]

Most likely water retention, wouldn't worry about it.