Seems to be the case to me. I had head pressure then migraines with over exertion. Only lately I had a 48 hour headache after a gym session. So in my case it is a warning that I am putting my body and mind under too much pressure.

I'm now in month 8, and I have just begun to differentiate between the dull headaches and the sharp, painful ones that sometimes lead to migraines.

I have tried to push through with some advil on the dull ones, but I take heed and slow down when and if it begins to throb.

However, having said that, I had vision therapy Friday, and the exercises triggered a dull headache, and I mistakenly pushed through them. Now I am with a big, bad migraine!

We all have different triggers and thresholds for pain, but I do think headaches are our bodies way of communicating to our brain. It is just with mtbi/pcs, our brain sometimes over-reacts or mis-interprets these signals.

Trust your intuition-you know best.