It's a brain condition affecting more than one million people in the UK and today thousands of walkers took part in a special event on South Tyneside to raise money to fight dementia.
The Alzeimer's Society Memory Walk in South Shields offered those taking part the chance to celebrate the life of a loved one who has battled the disease:
A care home in Darlington which has been using music as an effective form of therapy has made its own music CD.
Residents, their family members and staff from Willow Green Care Home have recorded their own version of the Bill Withers hit'Lean On Me'.
Organisers are hoping the CD will help highlight World Alzheimer's Awareness Month.
More than a thousand people have attended a Memory walk on Tyneside to raise awareness about dementia.
The Alzheimer's Society says there are 34 thousand people in the North East living with the disease.
The walk was started by Ruth and Lesley Crowe, the widow and daughter of former Newcastle player Charlie Crowe - who died of dementia.
A Newcastle United fan has left more than £10,000 in his will to fund research into dementia - because he was always scared of the illness.
Ernest Brown, who lived in Heaton, died at the age of 82 after a stroke. His great nephew Tom Hanson said his grandfather had donated the money to Alzheimer's Research UK because he had always worried about developing it, although he never did.
The charity thanked Ernest and his family for the gift, saying his legacy would fund 530 hours of scientific research.
One Primary school in Houghton le Spring is leading the way towards creating a Dementia Friendly Society.
Bernard Gilpin School is the only one in the North to take part in the Prime Minister's Challenge on Dementia and now it's opened it's doors to welcome sufferers in.
Watch Julia Barthram's report here.
Chair of Governors Bob Heron says that every school should be involved with the community. He says schools are not there to simply teach reading, writing and arithmetic.
One school in Houghton le Spring is leading the way towards a Dementia Friendly Society.
Bernard Gilpin School is the only one in the North to take part in the Prime Ministers Challenge on Dementia and now it's opened it's doors to welcome sufferers in.
75% of people in the North East fear living in a care home, according to an Alzheimer's Socierty poll. But Angela Drake from County Durham isn't one of them. She says she had excellent support from Bowburn Care Centre before her father passed away.
Inspector Morse and Lewis actor Kevin Whately and Karen Weech spoke to Daybreak about their struggle to find a care home for their mothers, who both had Alzheimer's.
Whately said too many people begin looking for a care home when they are in crisis and then become "stuck" looking at places that "won't do":