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For a couple of years, I've had a really poor neck. I formerly went to the doctors in Jan and they told me to go to a Pt to stretch it out. I did and did the excercise they gave me. However I did not do them that often like they told me too. A couple of weeks ago I found out that Only when i turned my head to the left and back forward to the front, I could here a little crack or pop in my neck (cervical backbone area)... Ever since then my neck/shoulder area kinda has been really poor even after I stretch. I can never sit in place for more than a minute because of my neck. Another things that has recently appeared was that this pain was kind of getting worse.. Not only can i keep my neck still when watching a movie or sitting down, but I did not sleep very well (lack of sleep).. In the morning i constantly would have stiff neck and minor headaches. Sometimes these symptoms would go away whether i do somethign that gets my mind off of it. I have full range of motion its just that left side of the neck/shoulder isnt going absent. I've taken a muscle relaxant and advil but dont want to be dependent on it.... I have read that neck pains may cause a brain tumor? I am worried? do i have it?