Do you get headaches caused by different locations?

Is one house more prone to dampness and hence mold and mildew?

Well, the troubling one is 150 and the other 8 years old, though I would think of it as quite dry for its age.

@Melonking: There still could be a lot of hidden but unidentifiable grottiness in the old house.

Could the one that gives you a headache have a carbon monoxide leak somewhere? Headaches are a symptom.

And it very well could be the lighting. Or are you sitting differently in one place vs. the other?

@zenvelo Thats actually a good point, there is an oil stove constantly on at one end and a wood stove at the other, with no opening windows.

There’s probably mold spores in the older one that you cannot see. Think of it as the dust of the ages. Also, in a house that old, if it has old insulation, it could have formaldehyde in it. How much remodeling work has been done on the older house? Do you get headaches there if you’re not working on the computer?

@BarnacleBill Probably no old insulation, it was an empty shell for 50 years used to store farm stuff.

I worked in a building which was originally a hospital pre-WWII. For the first month I worked there, I had a headache by the time I went home if I was in the building for more than a couple hours at a time. I think it had something to do with all the old dust as well as mold and mildew which had accumulated. It had been retrofitted or renovated at some point to change it from a hospital to offices, but I am not sure when. I did get accustomed or immune to it at some point as the headaches did stop. The lighting could also be a factor if you have better light in one location than the other.

If I am near the beach, I get headaches due to air positive ionization. Is there a lot of wind at the old house?

I have stopped going to a particular shopping centre because, for some reason, I always get a headache when I go there. I don’t know why this differs from other shopping centres.