What is a tension headache?

A tension headache is a headache that lasts anywhere from 30 minutes to seven days. It's usually on both sides of the head. Not severe, so mild to moderate in intensity. Not aggravated by physical activity and usually has a pressing or tightening quality to it. It doesn't have any associated nausea or vomiting and if present there's usually only one of lighter sound sensitivity. Often times it's described in terms of what migraine is not. So, it's not one-sided. It's not pulsating or throbbing, it's not severe and not aggravated by movement.