Tension headaches are among the most common forms of headaches. Unlike migraine headaches, these headaches tend to be only mildly to moderately painful. Instead of the stabbing or throbbing pain associated with migraines, tension headaches are more commonly described as a feeling of tightness or pressure. More than just the head, this condition affects the neck and facial muscles as well. Although these conditions are fairly common, the exact causes remain something of a mystery. As with most types of headaches, people with tension headaches may be able to get some relief from the pain with the use of marijuana.