My daughter has been driving ICE a fair bit for the last few weeks instead of just her Model-3. She suffers ("somewhat", rather than "drastically") from migraines and told me that she's had a few starting to come on of late and, reflecting on it, is pretty sure that they stopped / receded from end June when she got the Model-3. She'll be regularly back in her M3 in a week or two, so will be interesting to see if that cures them again ... ... she hypothesised that it might be less noise and Autopilot use and so on, but of course the possibility of petrochemical allergic interference might also be the cause. M3 apparently has well above average air filters, but I've seen DIY videos for fitting HEPA filters, so she'll have a go at that and see if that helps too. I probably ought to look at one of those Dyson air filter fan thingies for her house too ... need her to find a nice opportunity for a Passive House and move out of her starter-home (its not a jerrybuilt affair, but it doesn't have MVHR etc.) P.S. I forgot to ask her whether incidence of migraines coincided with having to fill up the ICE.