Home / Lab Results / ANA
Lab Result Guide

Positive ANA: what it means and what usually happens next

A positive ANA is one of the most common "abnormal" lab results in medicine, and most people who have one do not have an autoimmune disease. Here is what the number actually tells you, what the pattern means, and how to think about next steps.

Created by Mahiar Rabie, MD, MS using the latest, highest quality evidence. This page is for education only and does not replace advice from your doctor.
Enter your ANA result

Enter your titer and pattern from your lab report below. You will get a plain-English explanation of what your result suggests and what questions to bring to your doctor.

The Basics
What is an ANA test, and why was it ordered?

ANA stands for antinuclear antibody. The test looks for antibodies in your blood that target proteins inside the nuclei of your own cells. Finding them does not mean your immune system is broken or that you definitely have a disease. It means these particular antibodies are present at a level the lab can detect.

Doctors typically order this test when you have symptoms that could suggest an autoimmune condition, things like persistent joint pain, unexplained fatigue, a photosensitive rash, or dry eyes and dry mouth that do not have an obvious cause. ANA is most helpful when there are features that genuinely raise concern for connective tissue disease, such as inflammatory joint symptoms, photosensitive rash, Raynaud's phenomenon, oral ulcers, or unexplained cytopenias.[1] The test is not designed to screen healthy people without symptoms. When it is ordered without a specific clinical reason, a positive result is much less likely to represent autoimmune disease.[2]

The ANA test is a starting point, not a final answer. A positive result opens a conversation with your doctor about whether further testing is needed. It does not confirm any diagnosis on its own.

How common is a positive ANA?
More common than most people expect

This is probably the most important thing to understand about a positive ANA: it is extremely common in healthy people. In a large study of healthy adults, approximately 32 percent tested positive at a 1:40 dilution, and about 5 percent tested positive at 1:160.[2]

To put that in perspective: because autoimmune disease is far less common than positive ANA results, many positive ANA tests in people without suggestive symptoms do not turn out to represent systemic autoimmune disease. The test was designed to be sensitive, which means it catches most people with autoimmune conditions but also picks up many people who do not have them.[2]

Positive ANA results are also more common in women than in men, and they become more common as people get older, even in completely healthy individuals.[3]

Understanding your number
What the titer (the ratio) actually means

The titer is written as a ratio like 1:40 or 1:320. It comes from a process where your blood sample is diluted repeatedly. A titer of 1:160 means the sample was diluted to 1/160th of its original concentration and still tested positive. A higher number means a stronger signal.

Higher titers are more likely to be meaningful, but even a high titer alone is not a diagnosis of anything specific.[4] The titer only becomes medically important when considered alongside your symptoms, physical exam, and any other test results.

Titer How common in healthy adults What it generally suggests
1:40 About 32%[2] Very common in healthy people. Least likely to be clinically significant on its own.
1:80 Still seen in healthy adults; exact prevalence varies by lab method[2] Low-moderate positive. Still frequently seen in healthy individuals. Symptoms and context matter more than the number here.
1:160 About 5%[2] Some labs use this level as a threshold for a clearly positive result, but reporting standards vary by laboratory and test method. More likely to be relevant, especially if you have symptoms.
1:320 Less than 5% High positive. More likely to be associated with an autoimmune condition, though still not a diagnosis by itself.[4]
1:640 or higher Uncommon in healthy people A very high titer may prompt a closer review of symptoms and more specific antibody testing. Referral decisions still depend on the full clinical picture, including your symptoms and exam findings.

One important note: once you have been diagnosed with an autoimmune condition and your ANA is confirmed positive, there is no need to repeat the test. Fluctuations in ANA titer over time do not reflect disease activity and do not change treatment decisions.[2]

ANA Patterns
What the pattern on your report means

When ANA is tested by indirect immunofluorescence on HEp-2 cells, which remains the traditional reference method for ANA pattern interpretation[5], the lab may also report a pattern. The pattern describes how the antibodies appear under a special microscope. Not all labs use the same method, and not every lab reports patterns in the same way, so your report may look different from someone else's.

Patterns can provide clues about which specific antibodies might be present, and those antibodies are loosely linked to certain conditions. But the connection is not strong enough to make a diagnosis from the pattern alone. Your doctor will usually order follow-up antibody tests if the pattern points toward something specific.[6]

🔙 Homogeneous (diffuse)
The most common ANA pattern, seen in about 36 percent of all positive ANA results.[7] It is associated with lupus (SLE), drug-induced lupus, Sjogren's disease, rheumatoid arthritis, and several other conditions. Because it is so common and so broad, this pattern alone does not tell your doctor much. They will likely order follow-up tests for specific antibodies like anti-dsDNA or anti-histone.[8]
🔘 Speckled (fine or coarse)
Speckled patterns are seen across several autoimmune diseases and also in some healthy people. Fine speckled is associated with antibodies like anti-SSA (Sjogren's, lupus), anti-SSB (Sjogren's), anti-Sm (lupus), anti-U1 RNP (mixed connective tissue disease), and anti-Scl-70 (scleroderma). The pattern can suggest which follow-up antibodies to check, but it is not specific enough to diagnose any condition by itself.[9] Follow-up testing is almost always needed to identify the specific antibody responsible.
🔰 Dense fine speckled (DFS)
An isolated dense fine speckled pattern is often seen in healthy people and is less strongly associated with systemic autoimmune rheumatic disease than many other ANA patterns, though results still need to be interpreted in the context of your full clinical picture.[10][11] One study found it in over half of healthy hospital workers with a positive ANA.[12] If this is the only pattern found and you have no symptoms, this is often not a reason for concern, though your doctor will make that call in context.
🟤 Nucleolar
Less common overall, but when present it is more specifically associated with systemic sclerosis (scleroderma) and inflammatory myositis. Seen in 15 to 40 percent of patients with scleroderma.[13] Your doctor will likely order additional antibody tests to identify the exact target.
🔵 Centromere
Classically associated with limited cutaneous systemic sclerosis, sometimes called CREST-spectrum disease. It can also be seen in primary biliary cholangitis and occasionally Sjogren's syndrome.[14] If you have Raynaud's phenomenon (color changes in fingers with cold or stress) alongside a centromere pattern, a rheumatology evaluation is usually appropriate.
🟢 Cytoplasmic
Technically these antibodies target proteins outside the nucleus, but they are reported alongside ANA results. Associated with anti-Jo-1 (inflammatory myositis, lung disease) and anti-Ro52 antibodies (lupus, Sjogren's, myositis). If this pattern appears, your doctor will likely test for specific myositis-related antibodies.[15]
Other causes
Things besides autoimmune disease that can cause a positive ANA

Autoimmune diseases are not the only explanation for a positive ANA. Several other things can trigger the same result:

Thyroid conditions: Autoimmune thyroid disease, including Hashimoto's thyroiditis, is a common non-rheumatic association with positive ANA.[16] If you have never had your thyroid checked, your doctor may want to do that.

Infections: Certain viral infections including Epstein-Barr virus, HIV, hepatitis C, and parvovirus B19 can temporarily cause a positive ANA.[17]

Medications: Some drugs can trigger a positive ANA without causing drug-induced lupus. TNF inhibitors (biologics used for RA, Crohn's, etc.) and minocycline are well-known examples.[18][19]

Family history of autoimmunity: Even if you are healthy, having a close family member with an autoimmune disease slightly increases the chance of testing positive.[20]

Liver conditions: Autoimmune hepatitis and primary biliary cholangitis are both associated with a positive ANA.[21]

What happens next
What your doctor will likely do after a positive ANA

What happens next depends heavily on the combination of your titer, your pattern, your symptoms, and your exam. Here is the general approach:

Typical next steps after a positive ANA
  • 🔍Review your symptoms and exam. A positive ANA without any clinical signs or symptoms usually does not require urgent action. Your doctor's clinical impression carries more weight than the number itself.
  • 🧪Follow-up antibody tests. Depending on your pattern and symptoms, your doctor may order specific antibodies like anti-dsDNA, anti-Sm (for lupus), anti-SSA/SSB (for Sjogren's), anti-Scl-70 or anticentromere (for scleroderma), or myositis-specific antibodies. These tests are much more specific than the ANA itself.[1]
  • 🩺Rheumatology referral. Your primary care doctor will refer you if they are concerned about systemic autoimmune disease and want specialist input. There is no specific ANA titer that automatically requires a referral. It depends on the full clinical picture.[1]
  • 📋Watchful waiting. For low titers with no symptoms, the most common approach is to monitor over time. ANAs can be present for years before any autoimmune disease develops, if it ever does.[22]
Common Questions
Things patients often ask
Does a positive ANA mean I have lupus? ▼

Not at all. A positive ANA is required for a lupus diagnosis (it is part of the 2019 ACR/EULAR criteria), but having a positive ANA does not mean you have lupus. In the general population, the vast majority of people with a positive ANA do not have lupus or any autoimmune disease.[2] Many other conditions and even normal variation can cause a positive result. A lupus diagnosis requires multiple specific criteria to be met, not just a positive ANA.

My ANA was 1:40. Should I be worried? ▼

Probably not. About 32 percent of healthy adults test positive at 1:40.[2] At this level, the result is considered very low positive and is often not clinically significant, especially if you have no symptoms. Some labs do not even consider 1:40 a "positive" result. That said, if you do have symptoms, even a 1:40 warrants a conversation with your doctor.

Should I repeat the ANA test to see if it changes? ▼

Generally, no. In patients who already have an ANA-associated autoimmune disease, repeating the ANA does not help because changes in titer do not reliably track with disease activity.[2] In people without a diagnosis, repeating the ANA is not usually recommended unless new symptoms develop.[23] If your doctor wants to monitor you, they will typically track more specific tests like anti-dsDNA, complement levels (C3 and C4), or other disease-specific antibodies.

Can medications cause a false positive ANA? ▼

Yes. Several medications are associated with a positive ANA, including TNF inhibitors (like adalimumab, etanercept) used for rheumatoid arthritis and inflammatory bowel disease, as well as minocycline (an antibiotic).[18][19] A medication-related positive ANA does not necessarily mean you have drug-induced lupus, but it is worth mentioning to your doctor which medications you are taking when you discuss your result.

What if my ANA is negative but my doctor still suspects autoimmune disease? ▼

A negative ANA makes lupus less likely, especially with modern HEp-2 cell testing. It does not rule out every autoimmune condition, however. In uncommon situations, specific antibodies such as anti-Ro/SSA may be present even when the standard ANA screen is negative, particularly in certain lupus subsets and some Sjogren's cases.[24] If your symptoms are convincing, your doctor may still order specific antibody tests even with a negative ANA.

I have a positive ANA and I am pregnant. What does that mean? ▼

If you are pregnant or planning to become pregnant, your doctor may check for anti-Ro/SSA and anti-La/SSB antibodies specifically. When these antibodies are present, there is a small but important risk of neonatal lupus and congenital heart block in the baby. Congenital heart block is uncommon but is the most serious potential complication, which is why this testing matters and why the pregnancy may be monitored more closely.[25] Most pregnancies in this situation proceed without complications, but knowing ahead of time allows for appropriate surveillance.

Related Guides
Other lab results you might want to understand
🔴
CRP and ESR Guide
What inflammation markers tell you
 🔷
RF and Anti-CCP Guide
RA antibodies explained clearly
 📋
Appointment Prep Tool
Questions to bring to your doctor
References
  1. Solomon DH, Kavanaugh AJ, Schur PH, et al. Evidence-based guidelines for the use of immunologic tests: antinuclear antibody testing. Arthritis Rheum. 2002;47(4):434-444.
  2. Tan EM, Feltkamp TE, Smolen JS, et al. Range of antinuclear antibodies in "healthy" individuals. Arthritis Rheum. 1997;40(9):1601-1611.
  3. Satoh M, Chan EK, Ho LA, et al. Prevalence and sociodemographic correlates of antinuclear antibodies in the United States. Arthritis Rheum. 2012;64(7):2319-2327.
  4. Li H, Zheng Y, Chen L, Lin S. High titers of antinuclear antibody and the presence of multiple autoantibodies are highly suggestive of systemic lupus erythematosus. Sci Rep. 2022;12:1687.
  5. Agmon-Levin N, Damoiseaux J, Kallenberg C, et al. International recommendations for the assessment of autoantibodies to cellular antigens referred to as anti-nuclear antibodies. Ann Rheum Dis. 2014;73(1):17-23.
  6. Chan EKL, Damoiseaux J, Carballo OG, et al. Report of the First International Consensus on Standardized Nomenclature of Antinuclear Antibody HEp-2 Cell Patterns 2014-2015. Front Immunol. 2015;6:412.
  7. Vermeersch P, Bossuyt X. Prevalence and clinical significance of rare antinuclear antibody patterns. Autoimmun Rev. 2013;12(9):998-1003.
  8. Haugbro K, Nossent JC, Winkler T, et al. Anti-dsDNA antibodies and disease classification in antinuclear antibody positive patients. Ann Rheum Dis. 2004;63(4):386-394.
  9. Damoiseaux J, Andrade LEC, Carballo OG, et al. Clinical relevance of HEp-2 indirect immunofluorescent patterns: the ICAP perspective. Ann Rheum Dis. 2019;78(7):879-889.
  10. Mahler M, Parker T, Peebles CL, et al. Anti-DFS70/LEDGF antibodies are more prevalent in healthy individuals compared to patients with systemic autoimmune rheumatic diseases. J Rheumatol. 2012;39(11):2104-2110.
  11. Mariz HA, Sato EI, Barbosa SH, et al. Pattern on the antinuclear antibody-HEp-2 test is a critical parameter for discriminating ANA-positive healthy individuals and patients with autoimmune rheumatic diseases. Arthritis Rheum. 2011;63(1):191-200.
  12. Watanabe A, Kodera M, Sugiura K, et al. Anti-DFS70 antibodies in 597 healthy hospital workers. Arthritis Rheum. 2004;50(3):892-900.
  13. Steen VD. Autoantibodies in systemic sclerosis. Semin Arthritis Rheum. 2005;35(1):35-42.
  14. Ho KT, Reveille JD. The clinical relevance of autoantibodies in scleroderma. Arthritis Res Ther. 2003;5(2):80-93.
  15. Dalakas MC. Inflammatory muscle diseases. N Engl J Med. 2015;372(18):1734-1747.
  16. Abeles AM, Abeles M. The clinical utility of a positive antinuclear antibody test result. Am J Med. 2013;126(4):342-348.
  17. Hansen KE, Arnason J, Bridges AJ. Autoantibodies and common viral illnesses. Semin Arthritis Rheum. 1998;27(5):263-271.
  18. Takase K, Horton SC, Ganesha A, et al. What is the utility of routine ANA testing in predicting development of biological DMARD-induced lupus and vasculitis in patients with rheumatoid arthritis? Ann Rheum Dis. 2014;73(9):1695-1699.
  19. El-Hallak M, Giani T, Yeniay BS, et al. Chronic minocycline-induced autoimmunity in children. J Pediatr. 2008;153(2):314-319.
  20. Maddison PJ, Stephens C, Briggs D, et al. Connective tissue disease and autoantibodies in the kindreds of 63 patients with systemic sclerosis. Medicine (Baltimore). 1993;72(2):103-112.
  21. Yang WH, Yu JH, Nakajima A, et al. Do antinuclear antibodies in primary biliary cirrhosis patients identify increased risk for liver failure? Clin Gastroenterol Hepatol. 2004;2(12):1116-1122.
  22. Arbuckle MR, McClain MT, Rubertone MV, et al. Development of autoantibodies before the clinical onset of systemic lupus erythematosus. N Engl J Med. 2003;349(16):1526-1533.
  23. Yeo AL, Leech M, Ojaimi S, Morand E. Utility of repeat extractable nuclear antigen antibody testing: a retrospective audit. Rheumatology (Oxford). 2023;62(4):1248-1253.
  24. Pollock W, Toh BH. Routine immunofluorescence detection of Ro/SS-A autoantibody using HEp-2 cells transfected with human 60 kDa Ro/SS-A. J Clin Pathol. 1999;52(7):684-687.
  25. Schulte-Pelkum J, Fritzler M, Mahler M. Latest update on the Ro/SS-A autoantibody system. Autoimmun Rev. 2009;8(7):632-637.
⚠️ When to seek more urgent medical attention

A positive ANA result itself is not an emergency. However, some symptoms alongside a positive ANA should prompt a faster medical evaluation rather than waiting for a routine follow-up:

If you experience any of these, contact your doctor promptly or seek urgent care. Do not wait for a scheduled appointment.

Disclaimer: This page was created by Mahiar Rabie, MD, MS using the latest and highest quality medical evidence. It is intended to inform and educate, not to replace the advice, diagnosis, or treatment of a qualified physician. Always consult your doctor with questions about your specific results and health situation.