I think mine might correspond with my blood pressure. It normally comes in with my morning coffee, or when I am being very stressed out by work. If I am ruminat

I think mine might correspond with my blood pressure. It normally comes in with my morning coffee, or when I am being very stressed out by work. If I am ruminating while trying to sleep it will be fantastic levels, piercing. I'm a slave to white noise, and during power outages will wake from a dead slumber to listen to the needle threading between my ears.