Dementia symptoms and diagnosis

From time to time, you may forget someone’s name, or why you went into a room. This doesn’t mean you have dementia. But if someone is increasingly forgetful, has difficulty managing, or doesn’t seem to be the person they were, these can be early signs of dementia.

Early symptoms

The four main types of dementia have different early symptoms. Below is a summary of the early symptoms of each.

Alzheimer’s disease usually comes on very slowly and causes:

• difficulty learning new things
• confusion about the date or time
• getting lost, especially in familiar places

Vascular dementia can come on quickly, often after a stroke. The symptoms depend on the part of the brain affected. They can include:

• emotional or personality changes
• a short temper or crying more easily
• memory loss or confusion

Dementia with Lewy bodies (DLB) has very specific early symptoms, including:

• seeing things that aren’t there (visual hallucinations)
• variable alertness
• symptoms of Parkinson’s disease, such as tremor (shaking), slow movements, and stiffness

Frontotemporal dementia usually comes on very slowly. There are three different types. Early signs depend on the type and include:

• loss of inhibition, odd and inappropriate behaviour and poor self-care
• speaking more hesitantly and having difficulty understanding long sentences
• forgetting words, what things are called or what they’re used for

At the GP

If you’re worried that you or a relative have been forgetting things more often than usual, it’s worth seeing the GP. If your relative agrees, it’s a good idea for someone to go with them. Early symptoms of dementia are often more noticeable to friends and family than the person themselves.

The doctor may ask about any other medical conditions they have and medicines they’re taking. They’ll ask about symptoms and how quickly they’ve come on, including:

• memory problems and confusion
• behaviour and mood changes – whether they are more depressed, anxious or angry than normal
• effect on normal daily activities – cooking, housework and bathing

They may use a special questionnaire or tool to assess symptoms. The doctor will also need to carry out an examination and do some basic tests, such as blood tests, and sometimes urine tests. This rules out other possible causes of symptoms, such as thyroid problems.

The GP should explain their findings at the end of their assessment, but they probably won’t be able to diagnose dementia on the spot.. If they suspect dementia, they’ll refer you (or your relative) to a specialist for more assessment.

Seeing specialists

Most people with suspected dementia will have Alzheimer’s disease. Their GP will refer them to local mental health services for older people, or to the local memory clinic. They can help with memory problems and suspected dementia.

If your GP suspects a rarer type of dementia, they’ll refer them to a specialist psychiatrist or specialist in diseases of the brain and nervous system (a neurologist). This may be because:

• they’re under 65
• symptoms are worsening more quickly than normal
• they have unusual symptoms, such as seizures or a symptom affecting one part of the body
• the diagnosis is unclear

The specialist can help to diagnose rarer types of dementia. These are more common in younger people and may be inherited. These include:

• rare subtypes of Alzheimer's disease
• vascular dementia
• dementia with Lewy bodies
• frontotemporal dementia

Dementia may also be caused by another medical condition, such as Parkinson's disease or Huntingdon's disease

The specialist will carry out tests. They may suggest a brain scan, such as:

• computer tomography (CT) scan
• MRI scan
• positive emission tomography (PET) scan

A dementia diagnosis can be overwhelming. And it can be upsetting for both the person and their loved ones. But it can also be a relief once you know there’s an explanation for the distressing symptoms.

Unfortunately, there's no cure for dementia, but there are treatments that can help. The doctor will monitor how well the person responds to their care and treatment. For Alzheimer's disease and dementia with Lewy bodies, medicines are usually started straightaway. If these help, the dose will be gradually increased.

The specialist or memory clinic may also suggest group therapy. Groups can provide mental stimulation as well as opportunities to reminisce and talk about the past. These could take the form of bingo, art or music therapy, or gardening. Planning regular activities can help to build a routine for the person with dementia.

There are also decisions to make about future treatment and support. It’s best to discuss these things when the person with dementia is still able to take part.

Power of attorney

It’s best to arrange power of attorney as soon as possible. It gives carers legal power to make decisions about healthcare and finances. You do this through a solicitor while the person is still able to agree to it. You can do this if they can no longer make decisions for themselves, but it's more complicated.

How you apply varies between countries of the UK. You can find out more on GOV.uk (England and Wales), the Office of the Public Guardian (Scotland) or NI Direct (Northern Ireland).

Benefits

You may be able to claim Attendance Allowance, Personal Independence Payment (PIP) or Carer’s Allowance. The Alzheimer’s Society has useful benefits information.

Making care decisions

If they're well enough, the person with dementia can make an 'advanced decision' or 'advanced statement'. An advanced decision is sometimes called a ‘living will’.

This details how people would like to be medically treated and cared for when no longer able to decide for themselves. There's good information about these on the Alzheimer's Society website.

Driving

You must tell the Driver and Vehicle Licensing Agency (DVLA) if you've been diagnosed with dementia. They’ll send you a questionnaire and ask for a medical report from your doctor. As long as your doctor agrees, you can still legally drive while the DVLA makes a decision. You may be able to keep driving, but this will be reviewed yearly. If the DVLA decides you can no longer drive, you have to stop. You can appeal but have to stop driving until the appeal is heard.

It’s easy to mistake dementia signs for another problem or health condition, or vice versa.

• Delirium can cause confusion and problems with memory and understanding. But it's usually temporary and comes on quickly. In older people, it can be caused by sudden illness – an infection or heart attack.
• Depression is often mistaken for dementia and may appear before dementia develops. As well as low mood and poor self-care, older people may be disorientated and have memory loss.
• Generalised anxiety disorder is an extreme and long-lasting anxiety. Symptoms similar to dementia include restlessness, poor concentration, and disturbed sleep.
• Hormonal conditions that can cause dementia symptoms include an underactive or overactive thyroid gland and an underactive pituitary gland.
• Head injury or repeated small head injuries over time can cause memory problems, mental slowness, and being up and down emotionally. This can be because of a history of contact sports, such as rugby.
• Hearing or sight problems can affect how well you understand things and make it look as if your mental ability is affected.
• Low levels of B vitamins can cause symptoms similar to dementia. These include confusion, memory loss, irritability, and a change in mental state. You need vitamin B12 and thiamine to keep your nervous system healthy.
• Drinking too much alcohol can cause symptoms similar to dementia. If you do this regularly over a long period, it can cause brain damage and lead to dementia.
• Reactions to medicines can affect the brain and cause confusion, including painkillers, antidepressants, anxiety medicines, and steroids. This is more likely in older people on multiple medicines.
• Mild cognitive impairment (MCI) means problems with memory and thinking that aren’t bad enough to affect daily life. MCI means you're more likely to develop dementia, but it's not inevitable. It may improve or stay stable.

Of course, memory naturally gets a little worse with age. These memory lapses are normal, but if they get worse or affect everyday life, they may be a sign of dementia.