Hi,
Thanks for writing in.
I suppose you have been having dizziness from 4 months and are alarmed because your blood tests and CT scan have come as normal.
Dizziness is a symptom related to many medical conditions.
Blood tests usually are done to see for any anemic condition or any low blood glucose state.
CT scan is done to see for causes within the brain (including the
cerebellum).
If your blood tests and CT scan are normal, the cause of your dizziness stemming from the
inner ear must be investigated. There is a nerve (
vestibulocochlear nerve) which arises in the brain and supplies the inner ear. Any stimulation of this nerve along its path can cause
severe dizziness. You may consult an ENT surgeon and they will put you through tests to check the vestibular apparatus in your inner ear.
Sometimes, dizziness spells can also be due to partial complex seizures, this may not be apparent but you may have to give a detail of the complete sequence of events experienced by you. This can be discussed with a neurophysician or
psychiatrist if there is no significant pathology in your inner ear.
Hope this helps.