I get chilblains and have to be very careful they don’t turn into digital ulcers. I am on a calcium channel blocker, nifedipine, which helps but the winter months are the worst times since I live in northern Indiana.
I use vaseline or Aquaphor with stretchy gloves at night which helps. During the day I keep them well moisturized with hand lotion. Cetaphil lotion is a good one and not too greasy.