Dementia is a chronic progressive cognitive impairment caused by diseases and conditions that affect the brain. It can affect people at different life stages and speeds. Dementia has many potential causes including drugs, emotions, metabolic disturbances, infections, tumors, head injuries, and alcohol. Over 850,000 people in the UK have dementia currently, and this number is expected to rise significantly in coming decades as more people live longer. Dementia poses huge emotional and financial burdens for those with the condition and their unpaid caregivers.