"His personality change…it was subtle. If we'd gone to a GP, they wouldn't have believed it."
Mark Preston was diagnosed with Frontotemporal dementia at the age of 42. His wife, Caroline, has shared their story with the Alzheimer's Society.
Frontotemporal dementia is a less common cause of dementia in which the first noticeable symptoms can often be personality or behaviour changes rather than changes in memory.
You can read the blog post about their experiences here or watch the YouTube video here.
"We made the vows 'in sickness and in health' when we got married, and that's what I'm trying to do."
Can you relate to anything that Caroline has shared in the article? Please feel free to comment or discuss your own experiences below.