Originally Posted by chroma

Let them know and see what their thoughts are.

There's a type of headache caused by getting more circulation than usual. People who drink coffee can get it if they miss their cup because coffee causes vasoconstriction. People who take nitro pills for angina can also get it.

I've had problems with neck tension so bad that it was compressed vessels in my neck causing my head to blanch and feelings of lightheadedness. On one such occasion, the tension suddenly released and I received the same type of headache I would get from missing coffee. It sucked, but I also knew it meant I got my circulation back and figured it would subside, which it did in about an hour.

Whatever your particular details are, maybe you are going through some changes.

Good luck.