24/03/2026
Did you know that you can have more than one type of dementia?
This is known as mixed dementia, and it affects at least 1 in 10 people who are diagnosed with dementia.
Dementia is caused by diseases in the brain. The most common types are Alzheimer’s disease, vascular or blood vessel disease, and Lewy body disease.
Sometimes, a doctor may find that a person has clear signs and symptoms of at least two different types of dementia. When this happens, they will make a diagnosis of mixed dementia.
Most diagnoses of mixed dementia tend to be a combination of Alzheimer's disease with vascular dementia. The two different types of disease combine to make symptoms worse than they would be on their own.
Less commonly, mixed dementia can involve more than two types, and it can also involve other rarer types of dementia.
There’s no fixed set of symptoms for mixed dementia. This is because a person’s symptoms depend on the relative contributions of each type of dementia that they have.
It’s common to have more symptoms of one type than another.
To know more about the likely symptoms of mixed dementia, you need to learn about the symptoms of the different types involved. We have lots of information about this on our website.
And if you’d like more information, support or advice, call the Dementia Support Line on 0333 150 3456.
