I had three days of pain free no drama from my shunt this week. Yesterday, barometric pressure headaches returned. Apparently, there is snow in the atmosphere expected later today. I've had episodes of dizziness since yesterday. The shunt is adjusting itself again and I feel distal catheter pain in my abdomen yesterday and today. Saturday morning around 11am was when I felt light throbbing from my shunt valve at the top of my head. This happened while I was driving yesterday, which almost never happens. Today, besides the pressure in my forehead, there is some pain in the back of my head from the chiari malformation, I acquired during the shunt revision in 2009.