Stroke is the most common cause of
aphasia.
Aphasia can develop following brain injury, caused by traumatic accident or when the brain is deprived of oxygen during stroke.
It may also be caused by brain tumour, neurosurgery or a brain infection.
About half of the people who show signs of aphasia have temporary or transient aphasia and recover completely within a few days.
For others, the symptoms may be present for many years, or forever.