What Causes Tingling Sensation In Hands?

A few years ago I noticed that every time I got a fright (fast movements while driving, dogs running out etc.), almost immediately I would get a rush of tingling sensations down my hands to the tips of my fingers. Now it happens more regularly and if I go cycling, the sensation stays with me for a few hours after. Since going into early menopause (I'm 39) I feel less respondent to many senses, yet the tingling seems far more. Could it all be linked?