Here is one definition of the tension headache:
“Tension headaches are dull pain, tightness, or pressure around your forehead or the back of your head and neck. Some people say it feels like a clamp squeezing the skull. Often called stress headaches, they’re the most common type for adults.  When you get them less than 15 days per month, they’re called episodic tension headaches. If they happen more often, they’re called chronic. These headaches can last from 30 minutes to a few days. The episodic kind usually start gradually, often in the middle of the day. Chronic ones come and go over a longer period of time. The pain may get stronger or ease up throughout the day, but it’s almost always there. Although your head hurts, tension headaches usually don’t keep you from your daily activities, and they don’t affect your vision, balance, or strength. There’s no single cause for them. Most of the time, they’re triggered by stress, whether from work, school, family, friends, or other relationships. Episodic ones are usually set off by a single stressful situation or a build-up of stress. Daily strain can lead to the chronic kind.  This type of headache doesn’t run in families. Some people get them because of tightened muscles in the back of the neck and scalp.  This This muscle tightness can come from not enough rest, bad posture, emotional or mental stress including depression, anxiety, fatigue, hunger and low iron levels.” – Web MD
   
Notice it says some people get them because of tightened muscles in the back of the neck and scalp?  That is where clinical massage therapy from can help.  Headache/Migraine maintenance is a specialty that I offer.  I have been working with chronic headache issues for over 16 years, with results that have improved the quality of life for many clients.  For some, their headaches go away completely and they never have an issue with them again.  For others, we figure out the perpetuating factors that contribute to the headache, then work to eliminate or change those factors to either eliminate or decrease the effects of the headaches.   In most all cases, quality of life is improved for the chronic headache sufferer when they utilize clinical massage therapy as a part of their headache maintenance program.