Headache, also known as cephalalgia, is pain anywhere in the region of the head and could be sharp, throbbing or dull in nature. They may even last for last for multiple days or could get over in less than an hour. Headache could include of a number of different conditions of the head and neck. . Facts on headache

The headache could be of different types and could last for any time between a few hours and several weeks.
The reasons of Primary headaches are caused by dysfunction or over activity in pain-sensitive structures in the head.
The most common form of primary headache is the tension-type headache.

Symptoms of headache

The most common signs of headache include:
Nausea and vomiting

Causes of headache

Common primary headaches include migraines, cluster headaches and tension headaches. The causes could be enlisted as

Any physical stress
Due to increased body temperature or external pressure
Pain over the scalp

Secondary causes of headaches includes

Blood clots