The pain comes and goes, but it happen at no specific time.
I have also had my iron levels tested because my hands are always cold and turn bluish purple and get orange spots on them when out in cold weather. But my iron levels are fine.
When does the pain happen(after eating, during a certain time of month, all the time, etc)? Are you on any medications or supplements?
A numb, pins and needles, type of feeling is typically a sign of poor circulation or a problem with a nerve or nerves. If you have been having issues with numbness, it would be a good idea to see your doctor about it.