Joise Yes. One day I got into a taxi, after 2 minutes, my eyes were getting tired and my mind was slipping , the nausea feel. Then I noticed the Taxi Meter LED (where the distance is measured). Took my phone camera, (slow motion activate), yep, the lights were flickering way too fast.
Migraine suppliments : I sometimes took coffein tablet , like pure caffein. And it went way :-) not recommended though.
Monitor : Please try ( If you can) to test it on your local shope. No laptop won't be that important here, It's latest Windows, and Integrated Iris XE graphics. But I can 100% confirm. There is NO PWM flickering and NO Temporal dithering on the Monitor. But HP laptop is 6 bit panel with extreme dithering (pixel level flickering.)
How to test : PWM : easy, phone camera, in 1x slow motion video, and 2x, you will see black bars moving like a zebra body
Temporal dithering : it's hard for us to figure out , need special equipment like oscilometer (something). But you can get an idea of it, search for "Grey wallpapper for testing' and if you look closely you can see, individual pixels moving so fast like grains of bacteria.
Before you buy a monitor, testing with a anti glare glass would be a better method. Because dithering causes a weird glare pattern on screen. It can trigger migraine. Search "glare pattern".
https://i.gzn.jp/img/2020/02/17/migraine-hyper-excitable-brain/001.jpg
This is the exact reason some screen give us hard time, nausea, panic mode etc.
see looking at this can trigger something inside your nervous system.
PWM is Huge bar flickering, Dithering is sub pixel level flickering.
if you are using windows, there is this app : Ditherig Version 2.3 (works on my HP)
https://kawamoto.no-ip.org/henteko/myapp_en.html
install it, tick "Disable all dithering" and test with some videos, if you can see gradients are broken. It's working.
There are some clean explantion on both PWM and dithering on YouTube, if you are curious.
If you have any doubts, please let me know.