Autoantibody / autoimmune testing
Blood tests that look for antibodies the immune system has made against your own body, used to help diagnose and monitor autoimmune conditions such as lupus alongside your symptoms.
✓ Medically reviewed by a GMC-registered consultant · last reviewed September 2026 · next review September 2027 · how we review
In short
- These tests look for antibodies against your own body, to help assess autoimmune conditions such as lupus or rheumatoid arthritis.
- A positive result is not a diagnosis: positive ANA is common in healthy people and increases with age, so it must be read with your symptoms.
- A diagnosis is never made on an antibody result alone — clinical features always come first.
- Testing without a clear reason can produce a misleading positive that causes anxiety; the result only matters if it changes your care.
A plain-English summary. The detail — including risks and recovery — is below.
At a glance
A general guide. Your specialist will give you advice for your situation.
Can support a diagnosis of an autoimmune condition when symptoms already suggest one
It is the wrong approach as a 'screen' in people with no autoimmune symptoms, because false positives are common.
Blood is taken from a vein in a few minutes. No special preparation is usually needed.
Interpretation by an appropriate specialist (rheumatologist or immunologist) alongside symptoms.
Blood is taken from a vein in a few minutes. No special preparation is usually needed.
Press on the site briefly. Mild bruising is normal and you can carry on as usual.
Results return, often with a titre and (for ANA) a pattern to aid interpretation.
More specific tests such as ENA or anti-dsDNA may be added to refine the picture.
What is autoantibody / autoimmune testing?
Normally your immune system makes antibodies against germs. In autoimmune conditions, it makes antibodies against your own body — these are called autoantibodies. Autoantibody testing looks for them in your blood to help work out whether an autoimmune condition might explain your symptoms.
There are many of these tests. A common starting point is the antinuclear antibody (ANA) test, which can be positive in conditions such as lupus (SLE), Sjögren's syndrome and scleroderma. If the ANA is positive, more specific tests — such as the ENA panel and anti-dsDNA — may follow. Rheumatoid factor and anti-CCP are used when rheumatoid arthritis is being considered.
The single most important thing to understand is that a positive result does not, by itself, mean you have an autoimmune disease. Positive ANA results are common in healthy people — found in a notable proportion of the general population — and become more common with age and in pregnancy. They can also appear with infections.
For this reason, autoantibody tests are only meaningful alongside your symptoms and examination. A diagnosis is never made on an antibody result alone. Testing without good reason risks finding a positive result that causes worry but does not reflect any disease.
Types, options & approaches
There may be different ways to do this. The right approach depends on the clinical question and your circumstances.
Options at a glance
These are the main approaches described in this guide. The right option depends on the diagnosis, your goals and what your clinician thinks is safe.
Antinuclear antibody (ANA)
A common screening test for connective tissue autoimmune diseases such as lupus. Often reported with a titre (strength) and pattern, but is frequently positive in healthy...
Extractable nuclear antigen (ENA) panel
More specific antibodies (such as Ro, La, Sm, RNP) usually checked after a positive ANA to help point towards a particular condition.
Anti-dsDNA
More specific for lupus and can reflect disease activity, so it may be used both to support diagnosis and to help monitor.
Rheumatoid factor and anti-CCP
Used when rheumatoid arthritis is suspected. Anti-CCP is more specific; rheumatoid factor can be positive in other conditions and in some healthy people.
Preparing for your test
- Bring a clear account of your symptoms: joint pain, rashes, dryness, fatigue patterns, and how long they have lasted.
- Note anything that makes symptoms better or worse, and any family history of autoimmune disease.
- List your medicines; some can cause a drug-induced lupus-like picture or affect results.
- Mention any recent infections, which can cause temporary positive results.
- Bring previous autoantibody results if you have them, to track changes and avoid repeats.
- Ask which specific tests are being done and what a positive or negative result would mean.
- No fasting is usually needed, but check any specific instructions.
What happens
A nurse or phlebotomist takes a blood sample from a vein in your arm; it takes only a few minutes. Depending on the question, the laboratory runs one test (such as ANA) or a panel.
If a screening test like ANA is positive, the laboratory or your clinician may add more specific tests, such as the ENA panel or anti-dsDNA, to refine the picture. Results often include a titre (how strong the result is) and, for ANA, a pattern, both of which help interpretation.
Your clinician — often a rheumatologist or immunologist — interprets the results strictly alongside your symptoms and examination. A weak positive with no symptoms is treated very differently from a strong positive in someone with clear clinical features.
Is this test right for me?
A good consultation should explore whether it's the right choice for you now — including reasons to wait or consider something else.
May not be suitable if…
- It is the wrong approach as a 'screen' in people with no autoimmune symptoms, because false positives are common.
- On its own it cannot diagnose any autoimmune disease.
- Testing during or just after an infection can give temporary positives.
- If symptoms point clearly to a non-autoimmune cause, testing may add little.
- Broad autoantibody panels ordered without a clinical question often mislead more than they help.
Delay or rearrange if…
- You currently have an active infection that may cause a temporary positive.
- The clinical reason for testing has not been clarified with a specialist.
- A drug that can cause a lupus-like picture is in use and not yet reviewed.
- Previous results are awaited that could guide which tests are needed.
- Symptoms are too non-specific to interpret a result meaningfully.
Alternatives to discuss
- No testing if there are no specific autoimmune symptoms.
- Focused single tests guided by symptoms rather than a broad panel.
- A standard NHS pathway via your GP or referral to rheumatology/immunology.
- Watchful waiting with a clear plan if symptoms are mild or evolving.
- Investigating other, more likely causes of the symptoms first.
Before you decide
Use this as a shared-decision checklist. The aim is not just “can this be done?”, but whether it is right for you, now, with the risks and alternatives clearly understood.
What matters most to me?
Think about symptoms, daily life, work, caring responsibilities, sport, fertility, travel, appearance and anxiety — the right choice depends on your priorities, not just the medical facts.
What are all my options?
Ask about waiting, monitoring, medicines, rehabilitation, a smaller or larger procedure, a different test, NHS referral, or a second opinion where that would help.
What would make me pause?
Active infection, pregnancy, unstable medical problems, smoking, medicines that increase bleeding, poor support at home, or feeling pressured are all reasons to slow down and get tailored advice.
What happens if I do nothing today?
For some problems, waiting is safe; for others, delay can make treatment harder. A good consultation should explain the trade-off in plain English.
Benefits
- Can support a diagnosis of an autoimmune condition when symptoms already suggest one
- More specific tests can help point towards a particular condition after a positive screen
- Some autoantibodies help monitor disease activity over time
- A negative result can help make certain autoimmune conditions less likely
- Helps direct care to the right specialist and the right treatment
Risks & complications
- Minor bruising or soreness where blood was taken
- A positive result that does not reflect any disease (common with ANA)
- Anxiety from a positive result before it is put in context
- Further tests triggered by a borderline or weak positive
- Feeling faint during the blood test
- A misleading result that leads to unnecessary investigation or a 'label'
- A temporary positive caused by a recent infection
- Infection at the needle site
- Starting down a treatment path based on an antibody result without sufficient clinical grounds
The biggest risk is misinterpreting a positive result. A positive ANA is found in a substantial share of healthy people and rises with age and in pregnancy, so on its own it is not evidence of disease. Testing without clear symptoms is the main way people end up worried by a meaningless positive. Ask why the test is being done, and remember a diagnosis is never made on an antibody result alone.
Published figures to discuss
These are low-risk blood tests with no procedural complication rates. The important uncertainties are about interpretation: positive ANA is common in healthy people and rises with age and in pregnancy, and the strength (titre) affects how likely a result is to be meaningful. Because reported positivity rates vary widely between populations and laboratory methods, no single figure is quoted here; the message is simply that a positive does not equal disease.
| Figure | Reported range | How to interpret it | Source / confidence |
|---|---|---|---|
| Positive ANA in people without autoimmune disease | Low-titre positives are common; around 10 to 20% is often reported in healthy populations | ANA should be requested for compatible symptoms, not as a general wellness screen. | Guidelines for clinical use of ANA and related autoantibody tests — PubMedpubmed.ncbi.nlm.nih.govPublished figure |
| False reassurance from a negative antibody test | Possible | Some autoimmune diseases are seronegative or evolve over time, so the clinical pattern still matters. | Guide sourcesClinical context |
| Over-diagnosis from broad antibody panels | Common when pre-test probability is low | Unexpected weak positives should be interpreted by someone who understands the assay and clinical context. | Guide sourcesClinical context |
| Antibodies predating symptoms | Recognised in several autoimmune diseases | A positive result may signal risk rather than current organ disease; follow-up depends on symptoms and objective findings. | Guidelines for clinical use of ANA and related autoantibody tests — PubMedpubmed.ncbi.nlm.nih.govSource-linked context |
These are literature figures, not a personalised prediction. Your own risks and likely benefits depend on your circumstances, your health, and how your care is carried out and followed up.
What happens afterwards
There is no physical recovery from having blood taken. 'Afterwards' is about waiting for results and understanding the careful way a positive or negative is interpreted.
- A small bruise or tender spot where blood was taken
- No change in how you feel — the test does not treat anything
- Being told a weak positive may not be significant
- Further, more specific tests after a positive screen
- A negative result that still needs reading alongside your symptoms
Aftercare
- Keep the dressing on for an hour or so if the site is sore.
- Do not assume a positive result means you have an autoimmune disease — wait for it to be interpreted.
- If further tests are recommended after a positive screen, arrange them.
- Bring your symptom history to the results discussion, as it matters more than the number.
- Do not start treatment based on an antibody result alone.
- Keep copies of results, especially the titre, so changes can be tracked.
- Ask whether a positive needs repeating or specialist review.
- Symptom history written down (joints, skin, dryness, fatigue)
- Note of what makes symptoms better or worse
- Medicine list and family history of autoimmune disease
- Note of any recent infections
- Previous autoantibody results gathered
- Clear note of how results will be communicated
- Questions about what a positive or negative would change
⚠ Get urgent help if…
- A high temperature with feeling very unwell, or symptoms that are rapidly worsening — seek urgent help
- Chest pain, severe breathlessness or coughing up blood
- New severe headache, confusion, seizures or weakness
- Reduced urine output, marked swelling or blood in the urine (possible kidney involvement)
- A widespread rash with feeling unwell, or painful sores
- Feeling faint or unwell after the blood test itself
Who to contact: your clinician, clinic or test provider first (keep their number to hand). For urgent advice when you can't reach them, call NHS 111. In an emergency, call 999.
General guidance — it doesn't replace the specific advice your specialist gives you.
Results & realistic expectations
A positive autoantibody result is a clue, not a verdict. Because positive ANA in particular is common in healthy people and increases with age and in pregnancy, a positive result on its own does not diagnose disease. The strength (titre) and, for ANA, the pattern, plus more specific tests such as anti-dsDNA or the ENA panel, all help — but the deciding factor is always your symptoms and examination.
A negative result can make certain autoimmune conditions less likely, though not impossible. The most useful result is one that changes your care: confirming a suspected diagnosis, guiding monitoring, or pointing to the right specialist. A positive that does not fit your clinical picture is generally not treated, and it is fair to ask your clinician what your result actually means for you.
Autoantibody results can change over time. Some, such as anti-dsDNA, may rise and fall with disease activity and are used for monitoring. A positive ANA can persist for years without ever leading to disease, and a result can be influenced by infection, pregnancy and age. So a single result is interpreted as a snapshot, and repeat testing is guided by symptoms rather than done routinely.
Related tests, treatments or support
Autoantibody tests are often used in sequence — a screening test such as ANA first, then more specific tests like ENA or anti-dsDNA if it is positive. Complement tests (C3, C4) are frequently added when lupus is suspected, as they help with both diagnosis and monitoring. Your clinician chooses the combination based on your symptoms.
Follow-up & long-term care
If results fit a clear clinical picture, you are usually referred to or managed by the relevant specialist, commonly a rheumatologist. A positive result that does not fit may simply be noted, with advice on what symptoms would prompt review. Some autoantibodies are monitored over time. A good service explains who interprets results and what would change the plan.
- Repeat testing of activity markers (such as anti-dsDNA) where a condition is being monitored
- Review if new symptoms develop, rather than routine retesting of a positive result
- Ongoing specialist management if an autoimmune condition is confirmed
- Keeping a record of titres to track changes over time
Repeat, follow-on and what comes next
- A positive screen often leads to more specific tests rather than a diagnosis.
- A weak positive may be repeated or simply observed.
- Some autoantibodies rise and fall with disease activity and are monitored.
- A positive can persist for years without ever leading to disease.
Ask what happens if the result is unclear or needs repeating, and what is included if further tests or follow-up are needed.
What good aftercare looks like
- Interpretation by an appropriate specialist (rheumatologist or immunologist) alongside symptoms.
- A clear explanation that a positive result is not automatically a diagnosis.
- A plan for any follow-on specific tests and for what symptoms would prompt review.
- Monitoring of activity markers where a condition is confirmed.
- Honest reassurance and a record of titres when a positive does not reflect disease.
What affects the cost
Costs vary a great deal between people and providers, and we don't publish prices. What matters is understanding what drives the cost and making sure your quote is complete. The main things that affect it:
- Whether a single test (such as ANA) or a wider autoimmune panel is done
- Follow-on specific tests (ENA, anti-dsDNA) if a screen is positive
- Whether complement tests are added when lupus is suspected
- The specialist's fee for interpreting results alongside your symptoms
- Phlebotomy and laboratory processing fees
- Any follow-up consultation or specialist referral
- Which autoantibody tests are included and which are added only if a screen is positive
- The laboratory fee and the specialist's interpretation fee, separately
- Whether a follow-up appointment to discuss results is included
- What happens, and what it costs, if more specific tests are needed
- Whether interpretation is by an appropriate specialist (rheumatologist or immunologist)
- Who is responsible for explaining results and arranging next steps
On the NHS? Autoantibody testing is available on the NHS when clinically indicated; private testing is sometimes used for faster access, but a positive result is not a diagnosis and must be interpreted alongside symptoms.
You're entitled to your total cost in writing — including reports, follow-up and what happens if the result is inconclusive — before you decide.
Consent traps and marketing red flags
These are not small details. They are often where patients lose choice, time to reflect, or realistic expectations.
Consent traps
- Presenting a positive result as a diagnosis without clinical correlation.
- Ordering broad panels in people without autoimmune symptoms.
- Not explaining that positive ANA is common in healthy people.
- Ignoring age, pregnancy or recent infection as causes of a positive.
- Starting treatment on an antibody result without sufficient clinical grounds.
Marketing red flags
- Selling an 'autoimmune screen' or broad antibody panel to people with no symptoms.
- Implying any positive result means an autoimmune disease.
- Not explaining how common harmless positive ANA results are.
- Suggesting the test will explain general tiredness on its own.
- Bundling many autoantibody tests together, raising the chance of meaningless positives.
Choosing a specialist safely
- Check the specialist is on the GMC Specialist Register for this area.
- Make sure they work at a CQC-registered service, and look for membership of the relevant Royal College or professional body.
- You're entitled to time to consider and to have your questions answered before you agree — the specialist who looks after you should explain it, not a salesperson.
- Be wary of pressure: time-limited offers or deposits taken before you've had time to think are red flags, not bargains.
- You're entitled to your total cost in writing — including any follow-up — before you decide.
Questions to ask your medical professional
Take this to your consultation. A good specialist will welcome every one of these.
- Why are you testing for autoantibodies given my symptoms?
- What would a positive or negative result actually change?
- How do you interpret my result alongside my symptoms and examination?
- Could this positive be caused by age, pregnancy or a recent infection?
- Do I need more specific tests, and what are they for?
- Should this result be repeated or reviewed by a specialist?
- Are you on the GMC Specialist Register for this area, and which Royal College or professional body are you a member of?
- Will you be the specialist who carries out my test, and who looks after me afterwards?
- What are the risks for someone like me, and how often do your own patients have a problem or need it repeated or redone?
- What does a realistic result look like — and what can this test not achieve?
- What are my options, including waiting, doing nothing for now, or choosing a different approach?
- Can I have written information, results and aftercare instructions in a format I can use, including any accessibility or communication support I need?
- What is the total cost in writing, including any follow-ups, and how much time do I have to decide?
Frequently asked questions
My ANA is positive — do I have an autoimmune disease?
Why might I need more tests after a positive ANA?
What does the titre mean?
Can a positive result be temporary?
Should I get an 'autoimmune screen' if I just feel tired?
Can I have these tests on the NHS?
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How we made this page
Medically reviewed by a GMC-registered consultant. Written in plain English, checked against NHS, NICE, GMC and relevant Royal College / specialist-society guidance, and kept under review. No clinic paid to appear on this page, and we publish no pricing. This is general information to help you prepare — it is not a substitute for advice from your own clinician. How we review our guides →
Source hierarchy: UK regulator and NHS/NICE guidance first, then relevant Royal College or specialist-society guidance, then peer-reviewed evidence for procedure-specific figures where available.
Sources & standards: Lab Tests Online UK — Antinuclear Antibody (ANA) Test Lab Tests Online UK — ENA Panel Lab Tests Online UK — Autoantibodies American College of Rheumatology — Antinuclear Antibodies (ANA) patient information British Society for Immunology — Clinical immunology guidelines Guidelines for clinical use of ANA and related autoantibody tests — PubMed South Tees NHS — Anti-nuclear antibody (ANA) test information
Reviews reflect patients' experience of care, not clinical outcomes. For procedure volumes and outcome data see PHIN.
Last medically reviewed 2026-09-21. Spotted something wrong or out of date? Report an error in this guide.
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