How do I get rid of this Tinnitus?

I have been suffering from an annoying ringing in both my ears for over a year. I can't remember exactly how it started. I have it day and night and it makes me want to chop off my ears! I don't notice it too much during the day when there are other noises to concentrate on.

However, trying to sleep is becoming a problem. I can't fall asleep without my fan on high. Does anyone know what I can do to get rid of my Tinnitus?!?!