ChrisSD wrote:I have been surfing about 2 times a week for about a month now. I find that I sometimes get a throbbing headache after paddling around in the surf for about an hour. Sometimes its so bad I have to stop trying to surf and paddle back to the shore until it goes away. Has anybody else ever experienced this? Does it go away over time? Could it be related to dehydration? Any info or insight would be helpful.
Hi Chris,
a headache like that needs some looking into.
1. When you paddle you hyper-extend your neck which can place pressure on the blood vessels in the neck and spinal cord cutting down blood supply to the brain,scalp and neck muscles.
Their response is pain to make you sit up and take notice. Extreme position of the neck in, extension, side bending, rotation or flexion for prolonged periods that produces pain, dizziness, nausea, pins and needles or deadness feelings down the arms are symptoms of problems that should be diagnosed.
Sports Medico, Chiropractor, find somebody that understands surfing and the stresses it puts on your body.
2 If your headache only occurs in cold water it is possibly what is called an icecream headache where the cold shortens the muscles and constricts blood vessels to those same muscles. This is not as concerning as the first type of headache.
Still get yourself checked out 
Finally dehydration? Possible but not likely, just hydrate well before you surf, preferably with an electrolyte drink.
If no headaches in the session it was hydration. If headaches are there , review and
do steps 1 and 2