A diagonal crease across your earlobe is a real physical sign that researchers have studied for over fifty years, and it does show a statistical link to coronary artery disease. But “statistical link” and “reliable warning sign” are very different things. The association is modest at best, roughly comparable in strength to individual risk factors you probably already know about, like having high cholesterol or smoking. If you spotted a crease in the mirror and went straight to a search engine, the honest answer is that the crease alone should not alarm you, but it is worth understanding what it means and what it does not.
What Frank’s Sign Actually Looks Like
The diagonal earlobe crease goes by several names, including Frank’s sign, after the American physician Sanders T. Frank, who first described its potential link to heart disease in 1973.1PubMed. Palaeopathology of the earlobe crease (Frank’s sign): New insights from Renaissance art The crease runs at an angle from near the ear canal (the tragus) toward the outer edge of the lobe. Not every line on your earlobe counts. In clinical studies, researchers typically look for a deep crease, more than about a millimeter wide, that covers at least two-thirds of the earlobe’s length.2BMJ Open. Relationship between diagonal earlobe creases and coronary artery disease as determined via angiography A shallow wrinkle or a short line near the edge of the lobe is not the same thing.
Researchers also distinguish between unilateral creases (one ear) and bilateral creases (both ears). This matters because studies consistently find that bilateral creases carry a stronger association with cardiovascular disease than a crease on just one side. In one large angiography study, bilateral creases appeared in about two-thirds of patients who had obstructive coronary artery disease, compared with one-third of those who did not.3PubMed. The relationship of diagonal earlobe crease (Frank’s sign) and obstructive coronary artery disease in patients undergoing coronary angiography A crease on only one side could easily be from sleeping on that ear or from habitual pressure, and researchers have specifically suggested that the ear being pressed between the skull and a pillow or hand can produce a crease mechanically.4PubMed Central. Paired Ear Creases of the Helix (PECH): A Possible Physical Sign
The Heart Disease Connection
Dozens of studies since the 1970s have examined whether people with Frank’s sign are more likely to have coronary artery disease. Many of them found a positive association. In patients undergoing angiography (where doctors thread a catheter to photograph the coronary arteries directly), the crease tends to show up more often in people whose arteries are significantly blocked. One study of patients admitted for ST-elevation heart attacks found that those with the crease had more diseased vessels: about 79% had blockages in two or more arteries, compared with 46% of those without a crease.5PubMed Central. Relationship between Earlobe Crease and Anatomical Severity of Coronary Artery Disease in ST-segment Elevation Myocardial Infarction The crease was independently linked to the severity of the arterial blockages even after accounting for other risk factors.
In the angiography study mentioned earlier that separated bilateral from unilateral creases, a bilateral crease was independently associated with obstructive coronary disease, but its odds ratio was relatively small: about 1.36. To put that in perspective, male sex carried a stronger association (about 2.0), and so did smoking (about 1.9) and diabetes (about 1.7).3PubMed. The relationship of diagonal earlobe crease (Frank’s sign) and obstructive coronary artery disease in patients undergoing coronary angiography The crease adds a small signal, but it is not a stronger predictor than risk factors your doctor is already tracking.
Not every study agrees. A review of the evidence noted that while many studies support the connection, others found no significant link at all.6PubMed Central. Ear lobe crease: a marker of coronary artery disease? The inconsistency is one reason the crease has never entered mainstream cardiology guidelines as a screening tool.
Links to Stroke and Vascular Disease Beyond the Heart
The crease is not only studied in relation to blocked coronary arteries. Researchers have also looked at stroke. A study comparing 116 patients with ischemic stroke to 232 matched controls found that earlobe creases were significantly related to coronary disease, diabetes, and a particular subtype of stroke called nonlacunar ischemic stroke.7Journal of Stroke and Cerebrovascular Diseases. Diagonal earlobe creases and ischemic stroke: Preliminary report A more recent study also found a significant association between the crease and ischemic stroke, even after excluding patients who already had known heart disease.8PubMed Central. Frank’s Sign: A Clinical Predictor of Ischaemic Strokes
There is also evidence connecting the crease to markers of arterial stiffness and thickening. In people without high blood pressure or diabetes, those with the crease had faster pulse-wave velocity (a measure of how stiff the arteries are) compared to those without it.9PubMed Central. Relationship Between Earlobe Crease and Brachial-ankle Pulse Wave Velocity in Non-hypertensive, Non-diabetic Adults in Korea Separately, in people free of clinical cardiovascular disease, those with the crease had thicker carotid artery walls, which is a recognized early sign of atherosclerosis.10PubMed. Diagonal ear-lobe crease is associated with carotid intima-media thickness in subjects free of clinical cardiovascular disease And a Korean study found the crease was an independent marker for metabolic syndrome after adjusting for other cardiovascular risk factors, though it cautioned that the prognostic value was limited.11PubMed Central. Association Between Earlobe Crease and the Metabolic Syndrome in a Cross-sectional Study
The pattern across these studies is consistent: the crease tends to travel with atherosclerosis, the gradual buildup of plaque inside arteries. Whether it shows up in coronary vessels, carotid arteries, or brain-supplying arteries, the underlying theme is vascular aging.
Why the Crease Is Not a Reliable Diagnostic Test
If the crease is linked to all these vascular problems, you might wonder why your doctor has never checked for it. The reason is that statistical association and diagnostic usefulness are not the same thing. A systematic review that pooled results across multiple studies found that the sensitivity of the crease for detecting coronary artery disease ranged wildly, from 26% to 90%, while specificity ranged from 32% to 96%. Most studies showed weak diagnostic power: positive likelihood ratios (how much the crease increases your odds of having the disease) mostly fell below 2, which is considered clinically unhelpful.12PubMed Central. Diagonal Earlobe Crease (Frank’s Sign) for Diagnosis of Coronary Artery Disease: A Systematic Review of Diagnostic Test Accuracy Studies The review concluded that the crease barely shifts your pre-test probability, and its presence or absence should not change clinical decisions.
Studies using autopsy data paint a somewhat more favorable picture, but still with important caveats. One forensic pathology study found that the crease had high specificity (about 86%) and a solid negative predictive value (about 85%) for fatal coronary artery disease, meaning if you don’t have the crease, there’s a good chance you didn’t die from blocked coronary arteries. But sensitivity was only about 61%, meaning many people with fatal coronary disease did not have the crease.13PubMed. Ear-ly Warnings: The diagnostic accuracy of Frank’s sign in fatal coronary artery disease – A forensic pathology study Another autopsy study found higher sensitivity (about 84%) but lower specificity (about 58%), and rated the crease’s discriminative power as moderate.14PubMed Central. Relationship Between Frank’s Sign and Cardiovascular Disease: An Autopsy-Based Study The numbers jump around because different studies use different populations, different definitions of the crease, and different thresholds for what counts as disease.
The bottom line from the diagnostic literature is that the crease works somewhat like a blurry warning light. It goes on more often when something is wrong, but it also goes on plenty when nothing is, and stays off plenty when something is. No major cardiology organization recommends using it as a screening tool.
What Might Be Causing the Crease in the First Place
The honest answer is that nobody is entirely sure why the crease appears. Several theories have been proposed, and they are not mutually exclusive.
The most widely discussed idea ties the crease to the same processes that damage blood vessels. The earlobe has a good blood supply from small end-arteries, and the theory goes that as atherosclerosis reduces blood flow to these tiny vessels, the tissue loses its elastic support and folds. This would explain why the crease correlates with vascular disease elsewhere in the body. Supporting this interpretation, one study found that Japanese men with the crease who also had metabolic syndrome had significantly shorter telomeres (the protective caps on chromosomes that shorten with age) than matched patients without the crease. Their average telomere length was about 7.6 kilobases versus 8.6 kilobases in those without the crease, a meaningful gap.15Circulation Journal. Diagonal Earlobe Crease are Associated With Shorter Telomere in Male Japanese Patients With Metabolic Syndrome Shorter telomeres are a hallmark of accelerated biological aging, and accelerated aging and atherosclerosis tend to go hand in hand.
Age itself is one of the strongest confounders. The crease becomes much more common as people get older, and so does cardiovascular disease. Disentangling the two is genuinely difficult. One stroke study specifically noted that earlobe creases were significantly related to advancing age in the full cohort.7Journal of Stroke and Cerebrovascular Diseases. Diagonal earlobe creases and ischemic stroke: Preliminary report When both the crease and heart disease are driven partly by aging, any study that does not perfectly adjust for age will overestimate the crease’s independent contribution.
Then there are purely mechanical causes. As noted earlier, some researchers believe that habitual pressure from sleeping, leaning, or even wearing heavy earrings can create a diagonal fold that looks identical to a crease caused by vascular changes.4PubMed Central. Paired Ear Creases of the Helix (PECH): A Possible Physical Sign If you always sleep on the same side, a unilateral crease on that ear is probably not a vascular sign. Genetics likely plays a role too. Some people are simply predisposed to develop the crease, and some families carry both the crease trait and cardiovascular risk factors for entirely separate genetic reasons, which can create an apparent association where no causal link exists.
What You Should Actually Do If You Notice One
If you have spotted a crease and are now anxious, here is a practical framework. First, look at it in context. A single crease on the ear you sleep on, especially if you are under 50 and otherwise healthy, is almost certainly not meaningful. A deep bilateral crease in someone with other risk factors, like a family history of heart disease, high blood pressure, high cholesterol, diabetes, or a smoking history, is a reasonable prompt to bring those risk factors to a doctor’s attention. The crease itself is not the issue; it is the company it keeps.
No doctor is going to order a cardiac catheterization because of an earlobe crease. What makes sense is the same advice that applies to anyone with risk factors: get your blood pressure and cholesterol checked, know your blood sugar levels, stay physically active, and do not smoke. Researchers who advocate for paying attention to the crease frame it as potentially useful in settings where advanced diagnostic tools are scarce.16Journal of Anesthesia & Pain Medicine. Exploring the Potential of Earlobe Crease as an Indicator of Coronary Artery Disease Risk: A Preliminary Case Study in Nepal In a rural clinic with no access to imaging equipment, noticing a bilateral crease in a middle-aged patient might nudge a provider to check blood pressure more carefully or arrange a referral. In a setting where routine bloodwork and imaging are readily available, the crease adds almost nothing to what standard risk assessment already captures.
One study’s authors put it well: what is really needed is long-term follow-up research that tracks whether the crease, combined with traditional risk factors, actually improves prediction of future heart attacks and strokes compared with traditional risk factors alone.17The American Journal of Medicine. Relationship between Diagonal Earlobe Crease and Cardiovascular Risk Until that kind of prospective evidence exists, the crease remains an interesting curiosity rather than a proven clinical tool.
The Anxiety Loop of Googling Body Signs
There is something worth saying about how you probably arrived at this question. Noticing a physical feature on your body and then searching for what it means is one of the fastest routes to unnecessary worry, especially when the search results include phrases like “associated with coronary artery disease” or “predictor of heart attack.” Research on health anxiety and internet searching has found a strong correlation between the two: people who are prone to health anxiety tend to search more, and searching tends to increase their anxiety, creating a reinforcing cycle that researchers call cyberchondria.18PubMed. The relationships between health anxiety, online health information seeking, and cyberchondria: Systematic review and meta-analysis Qualitative research into this phenomenon found that while people initially search for reassurance, the process often backfires, producing what was described as short-term gain but long-term pain.19The Cognitive Behaviour Therapist. Understanding ‘cyberchondria’: an interpretive phenomenological analysis of the purpose, methods and impact of seeking health information online for those with health anxiety
The earlobe crease is a perfect case study in this dynamic. The scientific literature contains enough positive findings to sound alarming, but the actual diagnostic value is weak, and no medical guideline recommends self-examining your earlobes. If you found this article because you noticed a crease and felt a jolt of fear, the most useful thing you can take away is probably not the odds ratio from any particular study. It is that the crease is one of many physical features (skin tags, arcus senilis in the eyes, gray hair patterns) that researchers have tried to link to cardiovascular risk over the decades, with similarly modest results. Your earlobes are not sending you an urgent message. Your blood pressure cuff, your lipid panel, and your family history are far more informative.
Why the Crease Keeps Getting Studied
Given that the diagnostic accuracy is poor, you might wonder why researchers keep publishing papers on it. Part of the appeal is exactly its simplicity. Looking at an earlobe costs nothing, requires no equipment, and takes a few seconds. In a world where cardiovascular disease is the leading cause of death globally, even a marginally useful visual cue feels worth investigating. Each new study tries to refine the question: does it work better in specific populations? Does it work better when combined with other physical signs? Does it predict severity, not just presence, of disease?
That last angle has produced some of the more interesting recent work. The study of heart attack patients mentioned earlier found that the crease was independently linked not just to having coronary disease but to how extensive it was.5PubMed Central. Relationship between Earlobe Crease and Anatomical Severity of Coronary Artery Disease in ST-segment Elevation Myocardial Infarction If the crease is better at predicting severity in people who already have confirmed disease than at screening healthy people, its clinical niche might be narrower but more defensible. There has also been interest in using machine learning to detect the crease from photographs, which would allow researchers to analyze much larger datasets without relying on two trained observers peering at earlobes in a clinic. Whether automated detection changes the crease’s clinical usefulness remains an open question, but the research community clearly is not done with Frank’s sign yet.
The crease also occupies an interesting spot in the broader story of what the body’s surface can tell us about its interior. Dermatologists and cardiologists have long catalogued external markers of internal disease: yellowish deposits around the eyes (xanthelasma), premature graying, a white ring around the iris. Frank’s sign fits neatly into this tradition. None of these signs are reliable enough to diagnose disease on their own, but collectively they remind clinicians that a careful physical exam still has value in an era dominated by imaging and bloodwork. The earlobe, for all its simplicity, is still teaching us something about the boundary between curiosity and clinical utility.