--- title: "Dementia: Symptoms, Causes & NHS Treatment | HealthAnswers" description: "Dementia — memory loss, early signs, types including Alzheimer" url: https://healthanswers.co.uk/conditions/dementia/ robots: noindex --- # Dementia: Symptoms, Causes & NHS Treatment | HealthAnswers Health A–Z Dementia — memory loss, early signs, types including Alzheimer's, diagnosis, and NHS support for patients and carers. Written by HealthAnswers editorial team Medically reviewed by [HealthAnswers UK doctor review panel](https://healthanswers.co.uk/our-doctors/) Reviewed 3 July 2026 ## Quick answer What is dementia? Dementia is a syndrome of progressive brain decline affecting memory, thinking, language, and daily function — not normal ageing. Alzheimer's disease is the most common cause. Early signs include forgetting recent events, repeating questions, and struggling with familiar tasks. See a GP for assessment — many treatable conditions mimic dementia. No cure yet but treatments slow some types; support services help patients and carers plan ahead. ## Who is this page for? This page is for people in the UK who want a plain-English overview of Dementia, including when to seek help and what NHS care usually involves. It explains general information, not what is wrong with you personally. ## Who should skip this page? Skip this page if you need a diagnosis, a prescription, or emergency care. It cannot replace a GP, pharmacist, NHS 111 or 999. If you are in immediate danger, call 999; for urgent advice that is not life-threatening, call 111 in England, Scotland or Wales, or use your GP out-of-hours service in Northern Ireland. On this page 9 sections ## Key facts about dementia - Dementia affects about 900,000 people in the UK — numbers rising with ageing population. - Memory loss alone is not dementia — must affect daily function and worsen over time. - Depression, thyroid disease, B12 deficiency, and medication effects can mimic dementia — reversible if treated. - Alzheimer's accounts for roughly 60 to 70% of cases — other types include vascular and Lewy body dementia. - Lasting power of attorney and advance care planning important early after diagnosis while capacity remains. ## Dementia — when memory loss becomes disease **Dementia** is not a single illness — it is a **syndrome** of **progressive cognitive decline** severe enough to **interfere with daily independence** — memory, reasoning, language, visuospatial skills, and behaviour. UK: **~900,000 people** living with dementia — projected **1.6 million by 2040**. **Not normal ageing** — though **prevalence rises with age**. ## Early warning signs **Memory:** - forgetting recent events — appointments, conversations - repeating questions - reliance on notes for what used to be automatic **Function:** - difficulty managing money , paying bills - getting lost in familiar areas - struggling with cooking — safety risks **Language:** - word-finding pauses - calling things wrong names **Behaviour:** - personality change — apathy, suspicion, disinhibition - poor judgement — scams vulnerability **Onset:** **gradual months to years** — **sudden confusion** → think **delirium** (infection, drugs) — **urgent treatable cause**. ## Main types ### Alzheimer’s disease (~60–70%) - memory first - slow progression over years - amyloid plaques, tau tangles pathology ### Vascular dementia (~17%) - stepwise decline after strokes or small vessel disease - executive function and speed affected - risk factors: hypertension, diabetes, smoking ### Dementia with Lewy bodies - fluctuating cognition - visual hallucinations - Parkinsonism — tremor, stiffness - sensitive to antipsychotics ### Frontotemporal dementia (younger onset) - personality and behaviour change before memory - language variants - 40s–60s peak ## Reversible mimics — why GP tests matter | Condition | Test | | --- | --- | | Depression (“pseudo-dementia”) | History, treatment trial | | Hypothyroidism | TSH | | B12 deficiency | B12, folate | | Normal pressure hydrocephalus | MRI — gait, urinary triad | | Medication anticholinergics | Drug review | | Chronic subdural haematoma | CT after falls | **Never label dementia without basic bloods and collateral history.** ## Diagnosis pathway - GP — concerns, informant history essential - Bloods — FBC, U&E, LFTs, TSH, B12, folate, glucose, calcium - Cognitive screen — MMSE/MoCA — gateway not diagnostic alone - Memory clinic — detailed neuropsychology - MRI brain — atrophy pattern, vascular change, exclude NPH, tumour **Disclosure** — sensitive, planned, with support. ## Treatment ### Alzheimer’s — symptomatic drugs - acetylcholinesterase inhibitors — donepezil, rivastigmine, galantamine — mild-moderate - memantine — moderate-severe - modest benefit — not cure — 6–12 month slowing in responders ### All types - treat cardiovascular risk — vascular - avoid anticholinergics - structured routine , orientation aids - manage agitation — non-drug first; antipsychotics last resort — stroke risk ## Legal and planning **Early after diagnosis** while **capacity** present: - Lasting Power of Attorney (health and finance) - advance decision - ** driving cessation** — notify DVLA - work and financial planning ## Carers **Unpaid carers** — **Carer’s Allowance**, **respite**, **Admiral Nurses**, **Alzheimer’s Society** helpline. **Carer breakdown** — common — **request carer’s assessment**. ## Prevention — population level - cardiovascular health — BP, exercise, not smoking - hearing correction - social engagement - no guaranteed prevention — reduces risk Dementia **frightens people into silence** — **early assessment** distinguishes **treatable mimics** from **progressive disease** and unlocks **years of better-supported living**. ## ! When to see a GP about dementia See a GP if you or a relative has memory problems affecting daily life — getting lost in familiar places, missing bills, confusion about time, personality change. Same-day if sudden confusion (delirium) with fever or illness — may be treatable infection not dementia progression. GP arranges blood tests, memory clinic referral, and brain scan where indicated. ## Common questions about dementia What are the early signs of dementia? Forgetting recent events while recalling distant past, repeating questions, difficulty finding words, struggling with money or familiar routes, misplacing items in odd places, mood or personality change, reduced judgement. Gradual onset over months — not sudden single-day confusion (consider delirium). Is memory loss normal with age? Mild forgetfulness — misplacing keys occasionally — can be normal ageing. Dementia involves progressive decline interfering with independence — unable to manage finances, medication, or self-care — worsening over time. Memory clinic assessment distinguishes. Can dementia be cured? Most causes are not curable currently — treatments slow progression in Alzheimer's (donepezil, memantine) and manage symptoms. Some conditions mimicking dementia are reversible — thyroid, depression, normal pressure hydrocephalus, B12 deficiency — reason for full workup before assuming Alzheimer's. What is the difference between Alzheimer's and dementia? Dementia is umbrella term for symptoms — memory and cognitive decline severe enough to impair life. Alzheimer's is specific disease — abnormal protein deposits (amyloid, tau) in brain — most common cause. Vascular dementia from small strokes is second common in UK. How is dementia diagnosed? History from patient and informant, cognitive testing (MMSE, MoCA), blood tests excluding reversible causes, brain MRI or CT showing atrophy or vascular changes. Memory clinic multidisciplinary assessment — may take several appointments. How can carers get support? Carer's assessment through local council, Admiral Nurse helpline, Alzheimer's Society, respite care, dementia cafés, Lasting Power of Attorney for finances and health. GP can refer to memory clinic social prescriber. ## Sources - [NHS — Dementia guide](https://www.nhs.uk/conditions/dementia/) - [NICE — Dementia assessment and management](https://www.nice.org.uk/guidance/ng97) - [Alzheimer's Society](https://www.alzheimers.org.uk/)