Two days out of the last few days, I've woken up with a throbbing type headache. It feels slight when i wake up but as soon as i start walking each step makes it throb worse. The throb happens with ever beat of my heart.

Things that helped:
Icing my neck and Meditation seems to help as the headache subsides and becomes a minor throbbing.

Is there a reason for these headaches upon waking up?