I've been for a swim a couple of times this week (for the first time since Christmas, since I managed a steaming cold at the beginning of Jan).
After getting out the water both times, I got a really unpleasant headache - like an ice-cream headache right above the eyes. It starts stabby and then dulls to a slightly annoying ache, then fine the next morning.
The temperature of the water at the pool is positively balmy, so it's not a temperature thing. I don't think my cap or goggles are too tight. I've never had it before, and I've only been for short swims (20 - 30 minutes) so I don't think it's a lying down / standing up thing.
Anybody else get this or know why it might happen?