Dementia Early Signs

Overview

Dementia is not one disease. It is a word for a group of symptoms caused by changes in the brain. These changes affect memory, thinking, language and the ability to do everyday things. Dementia is not a normal part of getting older — some forgetfulness is normal, but dementia is more serious and it gets worse over time. Many different conditions can cause dementia, and Alzheimer's disease is the most common one.

Yes, dementia is very common. Millions of people around the world live with it, and the number is rising as people live longer. Because it is so common, most people know someone affected, and there is a lot of help available.

Dementia mostly affects older adults, and the risk grows with age — especially after 65. But it can also affect younger people, sometimes in their 40s, 50s or early 60s. This is called young-onset or early-onset dementia. It affects men and women, and people of every background.

Symptoms

Common symptoms

• Short-term memory loss that interferes with daily life, such as forgetting recent conversations or repeating the same question.
• Losing things in odd places, like putting keys in the fridge, and being unable to retrace steps.
• Trouble finding the right word, or struggling to follow a conversation.
• Getting lost or disoriented in places that used to be familiar, like the route to the shops.
• Difficulty with familiar tasks — paying bills, cooking a usual meal, or using the TV remote.
• Problems with time and dates, such as not knowing what day it is.
• Poor judgement, such as giving away money or dressing for the wrong weather.
• Changes in mood or personality — becoming irritable, anxious, suspicious or withdrawn.
• Losing interest in hobbies, work or seeing friends.
• Struggling to plan, organise or solve everyday problems.
• Misplacing everyday items and accusing others of taking them.
• Difficulty judging distances or noticing changes in vision.

Symptoms in children

• Dementia itself is very rare in children — it is mainly a condition of later life.
• Children are more likely to be affected by seeing a grandparent or parent change, and may feel confused, scared or left out.
• Simple, honest explanations at their level can help, such as: 'Grandad's brain is not working the way it used to, and it is not because of anything you did.'
• Children may need extra reassurance, consistent routines, and permission to ask questions.

Symptoms in older adults

• It is normal to occasionally forget a name or misplace glasses — this is often just normal ageing.
• A warning sign is when forgetfulness starts to affect daily life, such as missing appointments, forgetting how to get home, or struggling with money.
• Older adults may notice these changes themselves, or a partner or family member may spot them first.
• Sudden confusion in an older person is not normal — it can be a sign of infection, medication problems or another urgent issue, and needs prompt medical attention.

Causes

Main causes

• Alzheimer's disease — the most common cause, caused by a build-up of proteins in the brain.
• Vascular dementia — caused by reduced blood flow to the brain, often after small strokes.
• Lewy body dementia — linked to a specific protein build-up, often with visual hallucinations and movement problems.
• Frontotemporal dementia — affects the front of the brain, often first noticed as personality or language changes.
• Mixed dementia — more than one cause at the same time, which is common.
• Some memory problems have treatable causes, such as thyroid problems, low vitamin levels, depression, infections, drinking too much alcohol, or side effects of medicines.

Risk factors

• Getting older — the biggest single risk factor.
• A family history of dementia, or certain genes.
• Heart and blood vessel problems: high blood pressure, high cholesterol, type 2 diabetes and smoking.
• Hearing loss that is not treated.
• Long-term depression and ongoing stress.
• Social isolation and little mental or physical activity.
• Head injuries, especially repeated ones.
• Drinking too much alcohol over many years.
• Poor sleep and untreated sleep problems.

When to see a doctor

See a doctor urgently if:

• A sudden, rapid change in confusion or behaviour over a day or two.
• Confusion with fever, or signs of an infection.
• Someone with memory problems who has fallen or hit their head.
• A person who seems unable to care for themselves safely, such as leaving the stove on or wandering outside.
• Thoughts of self-harm or suicide — seek help right away.

Book a routine appointment if:

• Memory problems that are getting worse or affecting daily life.
• Repeating questions, forgetting recent events, or struggling with familiar tasks.
• Getting lost in familiar places, or problems with money and bills.
• Changes in mood, personality, or behaviour that are not like the person.
• A family member or friend is worried about changes they have noticed — it is fine to book an appointment on their behalf.

Diagnosis

Your doctor will usually start by talking with you — and, if you agree, with someone who knows you well. They will ask about the changes you have noticed, how long they have been happening and how they affect daily life. They will check your general health, review your medicines, and do some simple memory and thinking tests. Blood tests help rule out other causes, and you may be referred to a specialist memory service for a fuller assessment.

Tests that may be done

• A conversation about symptoms and daily life, often with a family member or friend present.
• Simple pen-and-paper or verbal memory and thinking tests.
• Blood tests to check thyroid, vitamin levels and general health.
• Review of all medicines, including over-the-counter ones.
• A brain scan (such as an MRI or CT scan) in some cases.
• A referral to a memory clinic or specialist for a fuller assessment.
• Sometimes, tests of mood and mental health, since depression can look like memory loss.

What to expect at your appointment

The assessment usually happens over more than one appointment, so do not expect a diagnosis on the first visit. Take a list of the changes you have noticed, your medicines, and any questions you want to ask. You are welcome to bring someone with you. Being told you have dementia can feel overwhelming, but the process is designed to be thorough, to rule out treatable causes, and to make sure you get the right support from the start.

Treatment

There is no cure for most types of dementia, but there is a lot that can help. Treatment focuses on supporting memory and thinking, managing symptoms, staying independent and keeping a good quality of life for as long as possible. It also involves supporting the people who care for you.

Self-care at home

• Keep a regular routine and use reminders: a calendar, a phone alarm, or notes by the door.
• Keep keys, glasses, wallet and medicines in the same place every day.
• Stay socially connected — see people, join groups, and keep up hobbies.
• Stay physically active within your ability, and keep your mind active with puzzles, reading or learning something new.
• Look after your sleep and eat regular, balanced meals.
• Limit alcohol and avoid smoking.
• Ask for help with tasks that have become difficult — accepting help is not giving up.
• Keep a list of your medicines and bring it to appointments.

Medical treatments

Your doctor or specialist may offer different kinds of support. For some types of dementia, certain prescription medicines can help with memory or thinking symptoms, and a specialist will explain whether these might suit you. Other medicines may be used to treat low mood, anxiety or sleep problems. Talking therapies, cognitive stimulation therapy (activities that exercise thinking and memory), occupational therapy to help with daily tasks, and practical support at home can all make a real difference. Your care team will also review your other health conditions and medicines regularly.

When is surgery considered?

Surgery is not a treatment for dementia itself. In some cases, an operation may be needed for a separate health problem, and your care team will carefully consider the risks and benefits with you.

Living with this condition

Life after a diagnosis can still be full and meaningful. Many people keep working, driving, volunteering and enjoying hobbies for a long time. Simple changes help: clear routines, labelled cupboards, a single calendar, and telling trusted people about your diagnosis so they can support you. It is also a good time to plan ahead — talk about money, legal matters, and what kind of care you would want — while you can make those choices yourself.

Lifestyle tips

• Keep moving: regular walking or gentle exercise supports both body and brain.
• Stay connected with friends, family and community groups.
• Keep your brain busy with things you enjoy.
• Protect your sleep and keep a steady daily rhythm.
• Reduce stress where you can, and ask for help when things feel hard.
• Make your home safer: good lighting, no loose rugs, and smoke alarms checked.

Diet and exercise

A heart-healthy diet is also a brain-healthy diet. That means plenty of vegetables, fruit, whole grains, beans, nuts and fish, and less processed food, salt and sugar. Regular physical activity — even a brisk walk most days — helps blood flow to the brain and supports mood and sleep. Aim for movement you enjoy and can keep up, and check with your doctor before starting something new if you have other health conditions.

Mental health and emotional wellbeing

Being told you have dementia, or watching someone you love change, can bring sadness, fear, anger and grief. These feelings are completely normal. It helps to talk about them — with family, a counsellor, or a support group. If you or someone you care for is feeling hopeless, or having thoughts of harming themselves, please reach out for help straight away: contact your doctor, a local crisis line, or your local emergency number. You do not have to cope alone.

Prevention

There is no guaranteed way to prevent dementia, and no single thing that causes it. But research suggests that looking after your heart, staying active, keeping socially connected, protecting your hearing, and managing conditions like high blood pressure and diabetes can lower your risk. It is never too late to start, and these steps are good for your overall health anyway.

Screening programmes

There is no routine screening test for dementia for people without symptoms. If you are worried about your memory or thinking, speak to your doctor — they can assess you and decide whether further tests are needed.

Complications

If left untreated

• Memory and thinking problems usually get worse over time without support.
• Difficulties with money, medicines and daily tasks can lead to unsafe situations.
• Low mood, anxiety and social withdrawal often increase.
• Carers and family members can become exhausted and unwell themselves.
• Problems may be missed that could have been treated, such as infections or medication side effects.

Long-term outlook

Dementia is a long-term condition, and it does change life. But many people live well for years after a diagnosis. Early diagnosis means earlier access to treatment, support, planning and help for family. Research into dementia is moving quickly, and services and support are better than ever. With the right help, people with dementia and their families can keep doing the things that matter to them.

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