It's more a description of symptoms than a description of cause, but being able to put a name on it makes it easier to ask about and Google. Basically, anything that can help treat this might be able to help with related RSI.
Both my wife and youngest daughter have Raynaud's. It's really obvious due to the external signs - though, as you say, I'd never have known what it was and that it was a thing before my wife told me about it.
https://www.mayoclinic.org/diseases-conditions/raynauds-dise...
It's more a description of symptoms than a description of cause, but being able to put a name on it makes it easier to ask about and Google. Basically, anything that can help treat this might be able to help with related RSI.