1. Bad blood flow such as stroke.
2. Lewy body, the brain produces deposit abnormal protein (Beta amyloid and Neurofibrillary tangles)
3. Brain injury
4. HIV/AIDS
5. Excess alcohol consumption
5. Bad level of blood and sugar pressure, sodium, and calcium
6. Lack of B12 Vitamin
7. Diabetes
According to (Amidei & and friends, 2021) a research entitled Association between Age at Diabetes Onset and Subsequent Risk of Dementia claimed that  younger age suffering diabetes highly contribute to the dementia. It can be concluded that diabetes case associates the dementia is not only for elderly but also younger age.
8.Hearing loss
Cited a research by (Ray, Dening, & Crosbie, 2019) entitled Dementia and hearing loss; a narrative review. This research claimed that hearing loss can cause dementia since hearing loss stimulate a change in the structure and function of the brain by stimulating brain work with high intention.
