Some people are unfortunate enough to have an existing problem that might be causing their troubles.
Such a condition is known as Raynaud’s phenomenon, which causes blood vessels to overreact to negative stimuli such as cold or stress, causing them to essentially batten down the hatches, as it were.
They tighten up needlessly, which can greatly restrict blood flow.
The symptoms aren’t always noticeable for this condition and doctors still aren’t entirely sure of its cause, but needless to say that if you’ve got it, it can be a major source of discomfort and frustration.
It’s usually found in either the hands or the feet, and sometimes both. One hand colder than the other is usually a good indication of where it’s worst. Fortunately, it’s not usually that serious beyond mild discomfort.