Broadcaster and Alzheimer's Society ambassador Angela Rippon told ITV News that dementia sufferers are fearful of leaving their homes because some communities do not understand their condition.
When asked why some people are reluctant to leave their homes, Rippon said:
She added: "If you have a society where people don't understand the needs of people with dementia, don't understand how to recognise it, the support that someone with dementia needs, then obviously as an individual you are going to withdraw back inside yourself.
"You're not going to want to go out into the public and be humiliated in that way."
More top news
Pregnant women who smoke are more likely to give up if they are given shopping vouchers, new research suggests.
Children are eating the equivalent of seven and a half chocolate fingers for breakfast, campaigners have warned.
Stephen Fry has suggested that the "the patter of tiny feet" may be on the agenda following his wedding to Elliot Spencer.