Headache while biking...

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I am going to call my doctor on Monday morning.

I just wanted to know if anyone else has this problem. It is only when I am on my bike. I am wondering if it has something do with the position of my arms and being hunched over. It happens whether I have my helmet on or off.

It feels like my head is going to explode! :explode:

I took a Tylenol this afternoon before going out, but it didn't help much. I have just started biking and I am really enjoying it, but do not want to keep doing something in pain.