Great question. I agree with Tina as it is hard to know what is causing that - whether it is because of a nutritional deficiency, metabolic disorder, etc. In regards to how I help people with those problems, I find that if the nerves - especially in the neck - are not working properly, this will decrease the ability of them to be able to vasoconstrict/vasodilate. That means that, your body will have a hard time being able to get blood flow to the extremities - such as the arms/hands and legs/feet. In a general sense, I help a lot of patients with that when I identify any misalignments of the spine through a proper exam and X-ray by biomechanical assessment. When the spine is aligned - more specifically it would be the neck and/or upper back to your question - then the nerves are able to allow proper blood flow and improve circulation. I hope this helps.