The cause for the majorityof people is
TENSION IN THE NECK AND SHOULDER MUSCLES.

Tinnitus is a pain in the neck
Elly's Tinnitus Resources
http://eebee.net/

Seems like a well thought-out questionaire would be very useful in
helping uncover people uncover possible causes for their T.  In
addition, it would prolly be of interest to the T population at-large
to see data from such questionaires analyzed for patterns.  Why dont we
put one together Francis? I think it'd be interesting to get a profile
of the T condition.  Unfortunately, such a questionaire will be lost in
a short amount of time if only posted on this newsgroup.  I'll be blad
to work up a questionaire in MS Word if anyone wants to throw in their
thoughts.
Here are some factors that may or may not be related to the onset of T,
just guesses from me. But it prolly doesnt hurt to have too many
questions.

Age, weight, height, gender, cholesterol level, blood pressure, (other
blood factor levels?), when T started,  any T in family (genetics), est
stress level (1-10), hours of sleep per night, diet (dieting?.
caffeine, soda, alchohol,etc) ,  OTC medications being taken,
prescribed meds being taken, detailed description of T symptoms: (high
freq hiss(es), waterfall, clicking, etc...), other current
medical/physical problems that may be related (shoulder/neck tenseness?
dizzy spells? etc) ,  use of q-tips in ear?,  frequency of exposure of
ears to: (water: swimming?, loud noises: music? shooting?
aircraft?...),  known ear drum damage in the past?,  occupation (maybe
exposure to some environmental elements?).

You have indicated a "trial and error" process for trying to  pinpoint
T causes.  I know you've contributed some ideas here in the past (like
doing without a pillow for a time) but could you write up your best
list of these T-cause identifying techniques?  I'd like to see your
complete list. Others may also have ideas on this also.
Thanx,
Jim Anderson