Headache Overview

What Is It?

Published: March, 2019

The International Headache Society classifies headaches into two main types: primary headache and secondary headache.

Primary headache includes:

  • tension-type headaches
  • migraines
  • cluster headaches.

Typically, tension-type headaches cause mild to moderate pain, usually on both sides of the head. There is a pressing or tightening sensation. It is not pulsating and is not accompanied by nausea. The headache does not get worse with routine physical activity.

To continue reading this article, you must log in.
  • Research health conditions
  • Check your symptoms
  • Prepare for a doctor's visit or test
  • Find the best treatments and procedures for you
  • Explore options for better nutrition and exercise
Learn more about the many benefits and features of joining Harvard Health Online »