My feet and hands will turn black when cold and hands go numb . what causes this and what type of doctor do i go to??????

It would be better to start with your primary care provider for an initial assessment and may be screening tests. It may warrant a consultation with a rheumatologist or cardiologist depending on the initial findings. Wish you good health!

Your internist or family doctor can help and if needed you will be referred to a specialist.

It sounds like a vascular condition. You should see your primary care to see if further work up is needed or medication can help