Dementia is a syndrome that occurs as a result of brain disease. It has been marked by a decline in cognitive abilities and it has a progressive course. It consists of damage to functions such as memory, thinking, understanding, learning, speaking and judgement. Additionally, changes in emotional control, social behavior and motivation occur in the affected person. Psychosocial factors are one of the important factors that affect the development of dementia. Psychosocial risks can be defined as the bio-psycho-social features of an individual. These risks are being updated in the interaction of individual traits and social circumstances. This paper presents psychosocial risks such as stress, and in particular stress in the workplace, depression, alcoholism, social relationships (social support, social network and social activity), family and education, and their relationship with the emergence and development of dementia . The paper also mentions the role of a social worker in the prevention of psychosocial risks that can contribute to the development of dementia and their role in the care of a person with dementia.