3y ago DR said Raynauds causes my feet&hands to be cold/blue/no feeling But why sometimes do they become hot/red/swollen/stiff;latter effects my sleep?

Raynaud's. During an attack of Raynaud's, the body limits blood flow to the hands and feet. This makes them feel cold and numb and then turn white or blue. As blood flow returns and the fingers or toes warm up, they may turn red and begin to throb and hurt.