How much water are you actually drinking? I drink around 3.7L of water a day which is the recommended amount for men. My longest fast was 72 hours and I definitely had digestive issues after breaking my fast and that’s normal. You can lessen digestive issues by breaking your fast with something like bone broth and then easing into eating an hour or two later and picking foods that are easy on your digestive system and not a lot of carbs.
I had hit that point, bathroom every 20 minutes…
Gatorade.
Sprinkle some salt in your water.
I recently discovered those water flavor packets and there are electrolyte ones.
Especially if you do a diet where you’re avoiding carbs, you need more salt/electrolytes.
You didn’t say how long your fast was but it sognificantly slows your appetite for 3-5 days.
Your gut biome has starved to death. Some kefir or probiotics will help your stomach quickly. I make sure to have a cup or so after a fast.
Replacing all that glycogen will make you drink like crazy. Normal, especially with the added salt