Hi, brittandjosie
many kind factor cause headache
one of them is lack oxygen in the brain which cause of blockage blood vessel
It usually happen in the nape to the near hoop
you can massage it and it work
You can try this also

1. stand up breath inhale with your nose and hold it
2. then hold your knee. let the body make straight and in right angle position with leg.
3. Push your holding breath to your head 10 seconds
   4 back to stand position and exhale your breath.