Hi, thanks for writing to HCM.
A transient loss of consciousness
or dizziness following a blow to the head is normal owing to concussion
But sudden throbbing and feeling of dizziness after 2 days of the initial episode indicates some issue inside.
A CT scan of the brain is needed to rule out any intracranial hemorrhage
(epidural or subdural hematoma
) causing the symptoms.
I suggest you to consult a Neurophysician for a detailed evaluation and management.
Hope this information is helpful. Good day