Left Foot, Right Foot

I continue to have these unexplainable pains in my lower legs and feet.  They never last more than a few seconds but I know whenever one hits.  The best description I have is the feeling you would get if someone were to stick you with a needle.  The pain is always very sharp and very exact.  The location may very (left foot, right foot) but I can tell with pinpoint accuracy that, for example, my left tendon is hurting just above the ankle.  My fear is that these pains are the signs of a bigger problem.  I am going to try and take it for as long as possible.  But sooner or later either the pain will go away or I am going to have to give in.