Dementia is a syndrome, usually of a chronic or progressive course, in which there is a decline in cognitive function or the ability to carry out the thought process. It affect memory first and then it affects thinking, orientation, understanding, calculation and judgment. Most common dementias are Alzheimer's disease, vascular dementia and Pick's atrophy. Health care for people with dementia is personalized and expensive. A family member becomes an informal caregiver and he develops burn syndrome. This work defines the concepts of aging and dementia and explains how they are created. It is important to be able to distinguish between old age forgetfulness and dementia. Main aim of the research was to gain insight into the emotional and physical state of the informal caregiver with regard to their working status. Informal caregiver spends his days with a demented person, cares about the person (clothing, food, bath, room, house), they are often under stress and physical and mental exhaustion. Caregivers are unpaid and is constantly with the patient. Informal caregivers undergoes different phases while providing healthy nursing care and, if not supported and helped by others, turns to bad things and lacks emphathy. This paper examined informal caregivers of people with dementia. The study included 56 participants from the territory of Croatia. The survey has been conducted in June and July 2019. Research results show that informal caregivers with the help of family members, can successfully reconcile time, butythey still feel physically and emotionally exhausted. Conducted research has shown that informal caregivers are often already employed, and even though they are emotionally and physically burdened, can still control and balance both, their job and personal obligations