feeling shudders

Could be many number of different things but a common variable should be your just perceiving a stronger energy then ur own.

thank you...

Either it is just a shudder or it is a blocked chakra.

there is no chakra back there.,...

If it's a chakra it could be a clairaudience point they wrap up the side/back of the head.

From your explanation it seemed so: http://www.angelfire.com/empire/serpent ... agram.htmlExternal ↗