It is a disease that affects 850,000 people in the UK and campaigners say communities need to change to help people with dementia.
At the Chester branch of Tesco, the country's first dementia friendly checkout has opened.
The checkout is clutter-free and a big sign shows which coin is which.
Every member of staff who works on the till has attended a Dementia workshop.
Through his talks, Dementia nurse Andy Tysoe hopes to challenge and change they way we see the disease.