Depression frequently co-exists with dementia. If people with dementia also become depressed they will be struggling with two lots of difficulties. The depression will exacerbate the effects of dementia making it even harder for people to remember things and making them more confused, more anxious or more withdrawn. It may also cause behavioural changes, such as walking around aimlessly, aggression, or refusal to eat.
It can be difficult to diagnose depression in dementia because some of the symptoms of depression and dementia are so similar, and because people with dementia may have difficulty explaining how they feel.
The causes for depression in dementia are likely to be similar to those for depression in general (see above). However, in the early stages they may also include worrying about memory loss and about no longer being able to cope as they had in the past. Chemical changes in the brain, caused by the dementia, may also lead to depression. People living in care homes seem to be particularly at risk of depression.