How can you tell the difference between a low pressure headache and a high pressure headache?

And I'm still trying to figure out what my triggers are...I think I figure out a trigger but then it doesn't happen again. :hmmm:

The easiest way to identify low pressure headaches is to lay down. If your pain goes away when laying down and hits you when you get up, then it's low pressure. Sometimes low pressure can also increase as the day goes on. You may start out feeling ok, but feel worse the longer you're up..this is usually associate w/ overdraining shunt. You can also have them after LP because of instant reduction of CSF (which should get better) or leak (which continues to get worse). I could never really find relief from high pressure, so it was fairly easy for me to identify.

As far as triggers, they really can be anything. Some people find different foods like dairy and caffeine make symptoms worse. Stress, sleep, exercise, falshing images, loud noises, bright lights, smells, weather..there are so many. I think because we have IIH we are susceptible to other headaches.

I found when I had low pressure headaches, just a few minutes after laying flat the headache would go away. Nothing helped when it is a high pressure that is really nasty. I have been very fortunate that meds and/adjusting my shunt seems to help make them go away. Once again, it seems to be trial and error.