Not exactly this, I don't think, but... hockey ball/slaz ball to the butt. Sit on it and roll around your glute. It just loosens everything in there and everything attached. Its solved many of my aches and pains, whether they feel like a kind of shooting pain, ITB or lower back. This is obviously just a maintenance move, so maybe get it checked out properly too. You don't want to aggravate something more sinister.
