I've been having daily headaches. I meet my protein and fluid goals every day. Could it be that I need more calories? I average about 430 calories a day. I'm in week 5/soft foods.

could also be due to low carb intake....

Yep, could be withdrawal symptoms from carbs. Could be because of ketosis too. Lots of strange side effects when that starts occurring including unpleasant body odours, keto flu, etc. If the headaches persist or you can’t manage them with over the counter meds, speak with your medical team

I've been low carb since my pre-op diet which started 7 weeks ago and it just now is effecting me?! That's kinda crazy. I average about 17 carbs a day.

I can usually get a good amount of relief from Tylenol. If it is a carb issue or ketosis, will the headaches eventually go away? How about the other unpleasant side effects of ketosis?

More likely ketosis then. Yep the ketosis symptoms do decrease & eventually vanish. Can’t recall how long it took for me but just remember realising they were gone. It wasn’t months. The bad breath & bad taste in my mouth was worst. Blerk! Carried mints with me everywhere. If you’re back at work take a toiletry bag with you with mouth wash, tooth brush & paste, deodorant, body wipes, etc. to help with the unpleasant acetone like odours throughout the day.

Glad the Tylenol works.

Oh, joy. I know it's a good and necessary part of the process. Thanks for the information.

I also get pounding headaches from low or high blood pressure. Once I came off my high blood pressure medication, the headaches disappeared.

I hope you get relief soon

That could be a lot of things--caffeine withdrawal, it's allergy season in a lot of places, too...in addition to everything everyone else suggested.

I'd also throw out there if the pain is coming from the back of your head or neck it's possible you're sleeping in a different position than you previously did due to things like your neck and shoulders shrinking/changing. I dealt with a ton of overall aches and pains as my body readjusted to its new size. Sleeping was a bit of an adventure for almost a year.