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You really should see a doctor.
There are two types of tinnitus. Vibratory and non-vibratory.

vibratory is caused by loud sounds. Non vibratory can be cause by a lot of different reasons such as a buidup of ear wax, antibiotics or asprin, too much alcohol or caffeine, anemia, blood flow problems and others.

Your best bet is to go have it checked.

I don't know if you smoke, but nicotine makes it worse. Gingko Biloba is supposed to help.