Hi there.
I also had these symptoms a few months ago but ignored it and eventually went away (don't follow my example :) I believe that this can be due to some problems with the nerves or blood supply to that area. Problems with the blood supply occurs in patients with hypertension or other systemic diseases such as diabetes mellitus. Deficiencies in nutrients such as Vitamin B or calcium may also present with these symptoms. Still I suggest that you take this to your doctor just to make sure there is nothing wrong.
Regards and God bless.
Hey! I'm glad to find out that I'm not the first to have this strange occurrence. It doesn't happen all the time, I just notice it from time to time, especially after wearing flip flops. I wouldn't be surprised if they are the culprit. But, I was wondering if you ever did head to the doctor and discover what was wrong? Any advice to pass along would be much appreciated!
Thanks!
-Jillian