Head to sore to do anything.

It is well known that headaches can be caused by many different things.
Some of these include:
Alcohol
Muscle tension
Eye strain
skeletal miss alignment
Whip lash
dehydration
Excessive noise
Toxicity

Headache relief can be eased, by a good remedial massage or reflexology, some of the time.
Also important is drinking a lot of water. Eight glasses a day is recommended, whether you have a headache or not.
This is because the body is made up of 80% water and if this level drops the toxicity level increases, sometimes resulting in a headache.