Just came across this marvellous link mentioned on another health site. The most comprehensive headache information I've yet come across. Some very useful accompanying videos too. Here is the link: Headache- Health911.com - Headaches, Migraine Headaches, Tension Headaches, Headache Causes, Headaches and Anxiety, Sinus Headaches, Chronic Headaches I used to get blinding headaches when I was younger (I found that magnesium worked for me.) so if you're a sufferer, I feel for you. Hope there is something in here to help you.