[Ammi]

..I'm sure I recall reading somewhere once..(I don't know if it's true..)..that if you take medication/paracetamol etc because you think that you may have a headache coming on/the possibility of one..?..taking it will actually induce a headache because you really don't need it and then it becomes a vicious circle..you take medication for that headache which you have induced by taking medication etc.... which also starts to 'trick' your mind into having headaches...