Drinking Water

Carbonated drinks have been found to deplete certain things the body needs. Boil the water if need be or maybe drink more fruit tea. I would suggest buying bottled SPRING water to supplement a few days per week. You need a human-friendly amount of minerals which are not filtered out of these (as well as sugar) to keep your BLOOD hydrated. I would also suggest seeing your GP and finding out if you need an IV to rehydrate. I used to do this when I lived in a dry climate once per year in the summer. It helps incredibly. My brother did this when he had too much to drink the night before while in med school & apparently it puts one right as rain. 

It could also be possible VOCs, formaldehyde or spores / mould, invisible to the naked eye, can cause this.

Are you taking any vitamins / supplements which might be having a side reaction (too much vitamin D can cause terrible headaches for instance and mushrooms complexes, ashwaganda, and other herbs will promote it, but moderation is key). If not any, I'd suggest adding a multi vitamin to your diet. 

I take a lot of Vitamin D tablets; plus I drink enough milk to do an army.

Perhaps that would explain my migraines.

Most likely. There are different types of headaches which will arise in different spaces in your head. Too much of anything is not healthy, add it could be deadly. Milk has added vitamin D. If you overdose on it, it causes a type of head ache. But it can do damage if you keep forcing your body to take something it cannot keep up with.

I would be mindful of any latest health 'fad'. One could find a reason to eat/drink anything if you look hard enough. From liver to chlorella to Lions Mane and beyond. But if you dig deeper, one should only have liver every 2 weeks tops. It's incredibly healthy and great for humans who cannot digest high fibre veg properly. Every vitamin has a max per day. And most won't absorb properly without their symbiotic relations, so to stay hydrated, plain water is not enough. The body needs a certain amount of salt and sugar to absorb it. This goes for everything. 

I'd work out how much D you're getting from milk and why you take extra. What else do you eat in a day and what else might contain it.

Every human body is different. It's important to understand a bit of your genetics (we are all prone to different complications), if there's anything it's good at producing (individuals who's genetics are designed for cloudy weather just won't need the amount of D that someone who's designed for blue skies would). At the very least a decent Multi and nothing else is quite useful. I take a mushroom complex which is good for the brain, for cellular health and heart health. But I'm aware it does boost Vit D, so I don't take it daily and I don't overdo sunshine.

Most likely. There are different types of headaches which will arise in different spaces in your head. Too much of anything is not healthy, add it could be deadly. Milk has added vitamin D. If you overdose on it, it causes a type of head ache. But it can do damage if you keep forcing your body to take something it cannot keep up with.

I would be mindful of any latest health 'fad'. One could find a reason to eat/drink anything if you look hard enough. From liver to chlorella to Lions Mane and beyond. But if you dig deeper, one should only have liver every 2 weeks tops. It's incredibly healthy and great for humans who cannot digest high fibre veg properly. Every vitamin has a max per day. And most won't absorb properly without their symbiotic relations, so to stay hydrated, plain water is not enough. The body needs a certain amount of salt and sugar to absorb it. This goes for everything. 

I'd work out how much D you're getting from milk and why you take extra. What else do you eat in a day and what else might contain it.

Every human body is different. It's important to understand a bit of your genetics (we are all prone to different complications), if there's anything it's good at producing (individuals who's genetics are designed for cloudy weather just won't need the amount of D that someone who's designed for blue skies would). At the very least a decent Multi and nothing else is quite useful. I take a mushroom complex which is good for the brain, for cellular health and heart health. But I'm aware it does boost Vit D, so I don't take it daily and I don't overdo sunshine.