Hi, Hannah! Great question. I did a quick search and even though our site has been around for more than 10 years, there actually hasn't been a lot of discussion about magnetic therapy. So thanks for asking! I think it also depends on what is approved for use in different parts of the world. In the US, it seems like there have been a lot of roadblocks.
We can't give recommendations or medical advice here, but we do have a couple resources you might want to read that can give you some basic info. Here they are:
https://migraine.com/blog/fda-approves-first-device-to-relieve-migraine-pain
https://migraine.com/forums/magnet-therapy
Hope these are a good starting place for you. -Melissa, migraine.com team