anyone know what this headache could be for past 5 years
daily headache which fluctuates in pain levels all day, never zero! can move around the whole head but mainly feels like tension type pain and also behind eyes, but sometimes at the back oh head, does not usually throb or cause nausea which is strange but it does ruin my life
sometimes double vision with it
can just change quickly , for example when getting up and going to another room can go from score 3 to score 7
past history: strabismus eye correction surgery (onset similar time to chronic headache)
many thanks