Many headaches originate in the upper neck region. For this reason, during a headache, apply a soft gel ice pack to the back of your upper neck (at the level of your hairline) while lying on your back. Cover the ice pack with a wet paper towel to ensure the transfer of maximum cold. Keep it in place for ten minutes. The ice helps treat both the associated inflammation and muscle spasms. 
 

Tuck your chin slightly and draw your head further back over your shoulders. (Most headache patients have what is called forward head posture.) This correction will decrease compressive forces on the nerves and joints, which are often aggravating factors in headaches.
 

 Fix your computer set up. Your monitor may be too high (causing you to backward bend your head on your neck) or too low (causing you to hunch forward to read the screen). Both of these faulty head/neck positions create stress and strain in the upper neck region, which can create or compound your headache.