Hi Seattlerain,
Thank you for your question and being part of our discussion forum - we're glad you're here!
Hot and/or cold can be used to ease pain, but unfortunately won't stop a migraine attack. Most people with migraine seem to like cold as a comfort measures. I on the other hand can't tolerate cold, but love heat.
Here is an article about hot/cold packs; https://migraine.com/blog/migraine-cold-and-hot-pack-recipes/. And this article has more comfort measures that are helpful; https://migraine.com/blog/comfort-measure-basics/
The Ice Kap seems to be very popular too. Here is the link for it; https://www.icekap.ca/. I've heard nothing but good things about this produce, however I'm not endorsing it.
I hope that helps!
Nancy