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What Is It?
The International Headache Society classifies headaches into two main types: primary headache and secondary headache.
Primary headache includes:
- tension-type headaches
- 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.
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