Can a blow to head cause dementia?

Yes, a blow to the head can potentially cause dementia, particularly if it results in traumatic brain injury (TBI). Repeated head injuries, such as those experienced in contact sports or certain occupations, can lead to conditions like chronic traumatic encephalopathy (CTE), which is associated with dementia-like symptoms. Additionally, even a single significant injury may increase the risk of developing neurodegenerative diseases later in life. It's important to monitor and manage head injuries carefully to minimize long-term consequences.