re:30-june2012 on vibrating sensation ... diagnosed as nerve twitch.
I (Koi is my name) have a similar twitch. Mine actually feels like in my bladder ... or maybe intestines. It is about 1 second long and a frequency of about every 5 seconds. It has lasted about 2 days now... and at the beginning I was convince a phone was in my pocket ringing on vibratory mode! It seems so un-natural for anything natural to mimic this sound (maybe 30 Hz with 1 sec duration about every 5-10 sec). It is not dependent/or in synch with breathing, motion or position. No pain or past injury in area. I not had any coffee or other caffine food for 24 hrs. No different food in my diet. I did crawl in an attic recently ... and was a bit sore on legs next day .. about 5 days back. No pain but just sore musles.

This is so weirdest felling .... it makes me concerned... do I have a alien or large parasite wiggling around in me :-). ..... to many sifi movies!