Meg, accupuncture, like most healing techniques, is about unblocking energy. very few people feel the need for LESS energy, so there are very few healing modalities to achieve it. If you needed very badly to relieve an energy overload, that'd be something to grapple with. if you don't, I'm not sure why you'd go looking for problems! Again, walking is the classic advice (I mean, for millennia) for people with buzzy feet. It grounds the energy. Several miles per day. Have you tried it? In any case, it's a totally normal thing and won't hurt you.
Weaver, I've written extensively on feeling of trapped energy in the head. The ball's my best tip, but there are others. See my replies to icedearth. And re: the ball, don't rev up your mind, just fill the ball with attention and energy. It's about the ball, not about being about the ball.