My wife has been keto for a few months now & for the most part things are going well. She noticed after eating yogurt that she felt off/down (low energy & cranky mainly) so as an experiment she removed dairy three days ago.
Oddly, since dropping dairy she’s felt like crap. Dry sinuses, low energy, achy & fatigued. Aside from removing dairy there have been no other alterations. Think it’s coincidental (maybe a virus/illness)? Or is there some type of dairy withdrawal that I’ve never heard of?
Could it be a carb thing? Like, keto flu all over again. If she ate a lot of dairy and didn’t replace it she could be eating and drinking a lot less.
Could be the body detoxing from dairy as if she has an intolerance, that often causes sinus issues. Or, it could be a cold bug. Give it time to see.
Yes, she’s been tracking closely & her macros are good. Either way many thanks for all the responses & suggestions!
It’s possible she’s getting sick. Timing could be a fluke. But keep investigating. Our bodies are mysterious things.
It get’s a bit stranger- her symptoms increased, specifically sinus congestion & general fatigue. She decided to try yogurt to see if it would worsen or help the issue; within about ten minutes her nose was completely clear & she felt better.
It seems removing dairy gives her the same reactions I get from eating it.
Weird! My first thought was dehydration. Maybe this WoE keeps her from generating enough mucus, and the dairy kicks it into gear. Who knows? 
Makes it sound like a cleansing crisis type of thing where symptoms get worse during detox.