Dear vanwy..your description fits
into a couple of skin conditions. Raynaud's phenomenon, erythema nodosum
are a few that spring to mind. However, this is a tricky subject especially when involving skin vasculature & hence needs to be seen in person by a dermatologist
& assessed together with the relevant blood-work to arrive at a definitive plan of managment. Do feel free to visit your nearby dermatologist or you may contact one of us with further details on this HCM portal using the 'ask-a-doctor; feature. regds & hope you are soon pain free & lesions resolve. Cheers!