Hi, I thought you may like this Mentalrobics exercise from Braingle.com:
-----------------
Tension Headaches

Tension headaches are the most common type of headaches. They usually appear as a dull throbbing pain that can radiate from the neck, back, eyes or head. The exact cause of tension headaches is still unknown, but a common theory is that it stems from muscle contractions around the head, neck and jaw. The brain may misinterpreted this tension as pain.

The most common cause of this type of muscle tension is stress [ For more on 'stress' go here: http://www.braingle.com/mind/534.html ]. Many people respond to stress by clenching their teeth or hunching their shoulders. This tension can quickly spread to other nearby muscle groups and caused referred pain. It is not uncommon for back problems to originate in the jaw! The more muscles that tense up, the more likely it will be for a tension headache to develop.

Tension headaches can be treated with over the counter pain medications as well as relaxation techniques such as massage or meditation [ For more on 'meditation' go here: http://www.braingle.com/mind/688.html ]. Learning how to relax the muscles in your neck, back and shoulders will help your avoid getting tension headaches. The shoulder stretching exercise [ For more on 'shoulder stretching exercise' go here: http://www.braingle.com/mind/663.html ] is one good way to accomplish this.
-----------------
For more mind exercises: http://www.braingle.com/mind/