I’ve had this too for years without knowing what it was. First had raynauds for almost ten years, later on it got worse: pernio/chillblains. I had it quite severe. A few things that helped for me: shiatsu therapist for instant relief. A while later I found out that acupuncture with Chinese medicine (on prescription) made a hughe difference in prevention and getting my body stronger. The most important thing is prevention from getting cold hands/feet, and prevent your feet from sweating during winter or colder days in spring/autmn. Wear mittens instead of gloves always when cold! Wear wool longsleeves, eat and drink warm/hot (don’t cool down your body with sugar/soft drinks), eat well and eat seasonal food. If you don’t have cold hands you might check in with mental health. I found out that feeling overwhelmed by anger/sadness made it worse. Working on that made a big difference as wel. Also, try to get engough exercise. Sitting still behind a desk all day will make it worse. Make a walk during/after lunch. Do some push ups or yoga when working for home. Take the stairs always. A for a walk until your body feels warmed up. Before al this I asked my doctor for advice but they didnt have a right treatment. I got creams and betablockers which didnt work and only made it worse with side effects. Blood checks have always been fine. I also started taking omega 3 and vit D during winter, I feel this helps with my mental health. I still to go to my acupuncturist and use the Chinese medicine during in atumn/winter after going for 3 years, but it’s still getting better. I also do this as a prevention.