Caffeine withdrawal headache

SUMMARY: Scientific analysis of headaches caused by caffeine withdrawal.

Caffeine withdrawal induced headaches are voted number one on list of ten worst symptoms.

• What are the symptoms of caffeine withdrawal headaches? – Well, if you will feel them you will know for sure - great pain in the head. It feels like if inside your head big volcano just exploded.
• What causes caffeine withdrawal headache?– Caffeine raises your blood pressure. When you drink caffeine on daily basis, blood vessels in your brain are used to being bigger. When you stop drinking coffee, they become smaller and it causes severe headache.
• How to fight those headaches?– Use OTC painkillers. Ibuprofenum is specialy effective.
• How can you help yourself? – Try to exercise - engage in any activity which will raise your blood pressure. It helps if you are not concentrating on headache. 
• What are the other symptoms of caffeine withdrawal? Look here.

Sources:

http://orton.catie.ac.cr/cgi-bin/wxis.exe/?IsisScript=CAFE.xis&method=post&formato=2&cantidad=1&expresion=mfn=026406

http://psy.psychiatryonline.org/cgi/content/abstract/21/5/411