This is what my therapist told me I asked her why and she said tinnitus, neck pain, headaches, eye pain, tmj, face pain, shoulder pain, upper back burning pain is becoming EPIDEMIC. Back in the 90's when she started with therapy, the only people she saw with neck pain were secretaries, people with tinnitus were mostly people exposed to loud noises, shoulder pain victims were people who worked with their hands. Headaches were rather hormonal mostly women and really tense people. Today she sees neck pain, tinnitus, headaches and so on like it's sand on the beach she says. Thanks to slouching and people inabilities to stay away from computers we have become a planet of slouching hunchbacks! She explained to me that when a muscle is overused, the body then uses surrounding muscles to support and take pressure off of that tight muscle allowing it to relax. But with computers our muscles have become so overused that people get stuck with chronic tightness and pain. She told me that the trapezius muscle (that big muscle on the back is the first to go bad) due to slouching and with that start the headaches, since the trapezius can only take so much, then the sternocleidomastoid comes in to help the load and causes a whole lot of freaky symptoms. Once the neck muscles are tight, the patient starts complaining of headaches, vision problems, burning sensations on the face, neck cracking..... and since it doesn't stop there, then the face muscles join the party and suddenly you have all sorts of facial sensations and tingling and burning PLUS TINNITUS She told me.... ONLY USE COMPUTERS WHEN YOU HAVE TO, THOSE THINGS ARE KILLING US!!!