Hello
Ringing in ears is called Tinnitus in medical language.It can be due to various causes.Although the cause is usually unknown, tinnitus can be a symptom of almost any ear disorder, including infection (otitis media), a blocked ear canal (ear wax) or eustachian tube, otosclerosis (overgrowth of bone in the middle ear), labyrinthitis, and Meuniere's disease. Even blast injury from explosions has been known to cause symptoms of tinnitus. Additionally, adverse side effects from some drugs (e.g., aspirin and antibiotics) cause tinnitus symptoms.
Click here to read about causes of tinnitus in detail
Tinnitus associated with dizziness should be examined by a ENT specialist.It can be due to inner ear pathology.
Check this link
http://www.uihealthcare.com/topics/earnosethroat/earn4451.html
Edited by dr_amitmunjal on October 7 2006 at 7:41 PM
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