Normal Earlobe Crease: Sign of Aging or Heart Disease?

A diagonal crease running from the tragus toward the outer edge of the earlobe, known in medicine as Frank’s sign, is linked to both cardiovascular disease and the biological aging process. The sign was first described by pulmonologist Sanders T. Frank in 1973, and more than five decades of research have produced a complicated picture: the crease does appear more often in people with coronary artery disease, but it also becomes more common with age regardless of heart health, and its accuracy as a standalone diagnostic tool is limited enough that no major cardiology guideline treats it as a formal screening criterion.

What the Crease Actually Looks Like

Not every wrinkle on your earlobe qualifies. The crease in question runs diagonally at roughly a 45-degree angle from near the ear canal opening down to the edge of the lobe. It can appear on one ear or both, and it can range from a faint, shallow line to a deep, well-defined furrow that spans the entire lobe. Doctors sometimes grade it on a scale from partial to complete, because the depth and extent of the crease seem to matter when it comes to cardiovascular risk. A barely visible line that only covers part of the lobe carries less clinical weight than a deep bilateral crease.

The crease should not be confused with lines caused by sleeping on one side, wearing heavy earrings over many years, or simple skin folding from the shape of someone’s ear. Those mechanical marks tend to be horizontal or irregular rather than following the characteristic diagonal path. If you are unsure whether what you see in the mirror fits the description, a healthcare provider can identify it in seconds during a routine physical exam.

The Heart Disease Connection

The most studied aspect of Frank’s sign is its relationship with coronary artery disease. A systematic review and meta-analysis found that people with a diagonal earlobe crease have roughly four times the likelihood of having coronary artery disease compared to those without the crease, and this association held even after adjusting for age and other traditional cardiovascular risk factors across all ten studies that examined that question.¹ That last point is important, because one of the most common dismissals of the crease is that it simply reflects getting older, and older people naturally have more heart disease. These studies tried to separate the two, and the crease still predicted heart disease independently.

A large study in a Chinese population found that after adjusting for age, sex, and traditional risk factors like high blood pressure and diabetes, the crease remained a positive predictor for coronary artery disease with about three and a half times the odds compared to people without it.² A study of patients who underwent coronary angiography similarly found that bilateral creases appeared in about two-thirds of patients with obstructive coronary artery disease, compared to one-third of patients without it.³

But the association extends beyond the coronary arteries. Researchers have found that older men with the crease are significantly more likely to harbor calcified atherosclerotic plaques in the internal carotid arteries inside the skull, which are a recognized cause of stroke.⁴ The crease has also been linked to peripheral vascular disease and cerebrovascular disease more broadly, suggesting it may reflect a systemic vascular process rather than something limited to the heart.⁵

The Aging Explanation

Here is where things get genuinely interesting. The crease does become more common with age, and some researchers have argued that it is nothing more than a wrinkle that happens to correlate with heart disease because both the wrinkle and the disease become more prevalent in older adults. But the telomere evidence complicates that neat dismissal.

Telomeres are the protective caps on the ends of chromosomes that shorten with each cell division. Shorter telomeres are considered a marker of accelerated biological aging. A study of Japanese men with metabolic syndrome found that those who had the earlobe crease had significantly shorter telomeres than age-matched men with metabolic syndrome who lacked the crease.⁶ The crease group had telomere lengths averaging about 7.6 kilobase pairs versus 8.6 in the non-crease group, a meaningful gap that persisted after matching for age and risk factors. The researchers proposed that Frank’s sign may be a visible indicator of an accelerated aging process driven by excessive telomere shortening.

In another case, a patient without any cardiovascular symptoms who had the crease was found to have a carotid artery wall thickness of 1.2 millimeters, well above the 0.56 to 0.71 millimeters expected for his age, suggesting his blood vessels were biologically much older than his calendar age. The crease, in other words, may not be “just aging.” It may be a visible sign that someone’s body is aging faster than it should be, and that accelerated aging is what drives both the crease and the cardiovascular disease. This reframes the either/or question in the title: rather than aging versus heart disease, the crease may be a surface marker of the same underlying process that produces both.

How Accurate Is It as a Diagnostic Sign

Here is where enthusiasm needs to be tempered. Saying the crease is associated with heart disease is not the same as saying it can reliably diagnose heart disease. The diagnostic accuracy varies enormously across studies, and the range is wide enough to make any doctor hesitant to act on it alone.

A systematic review of diagnostic test accuracy studies found that sensitivity ranged from 26 percent to 90 percent, and specificity ranged from 32 percent to 96 percent, depending on the study population and methods used. Most of the positive likelihood ratios were below 2, meaning the crease only modestly increased the probability that someone actually had coronary artery disease.⁷ The review’s overall conclusion was that the diagnostic accuracy of the crease is insufficient for reliably detecting chronic coronary disease on its own.

Individual studies, depending on their design, paint a somewhat brighter or dimmer picture. An autopsy-based study found the crease had 84 percent sensitivity and 58 percent specificity for critical coronary artery narrowing, with moderate discriminative power.⁸ A separate forensic pathology study found higher specificity at 86 percent but lower sensitivity at 61 percent for fatal coronary artery disease, and characterized the overall discriminative power as “fair.”⁹ The angiography study mentioned earlier found that the crease’s diagnostic accuracy was modest and similar to that of traditional risk factors like smoking or diabetes.³

In practical terms, these numbers mean the crease catches a reasonable number of people who do have heart disease (decent sensitivity in some settings) but also flags a lot of people who do not (limited specificity). It works best as a quick visual cue that something may deserve further investigation, not as a standalone test.

Bilateral Creases Carry More Weight

One consistent finding across studies is that having the crease on both ears matters more than having it on just one. An observational study that assessed cardiovascular risk using three different established scoring systems found that risk climbed in a stepwise fashion: lowest in people with no crease, intermediate in those with a unilateral crease, and highest in those with creases on both sides. Using the Framingham index, for instance, average cardiovascular risk roughly tripled from about 5 percent in the no-crease group to about 14 percent in the bilateral crease group, moving from a low-risk to a moderate-risk category.¹⁰

This dose-response pattern strengthens the case that the crease is not a random wrinkle. If it were purely cosmetic, there would be no reason for bilateral involvement to predict more disease than a single-sided crease. The grading of severity also seems to matter: deeper, more complete creases tend to carry stronger associations than partial or faint ones.

Age Makes the Picture Murkier, and Clearer

The crease becomes more prevalent with age in the general population, just as heart disease does. In a cross-sectional study, both earlobe crease frequency and metabolic syndrome prevalence climbed with increasing age, and the crease was associated with higher cardiovascular risk scores even after adjusting for conventional risk factors.¹¹ This overlap is what makes some clinicians skeptical: maybe the crease is just a proxy for being older.

But the crease may actually be most useful precisely where that argument breaks down: in younger people. A forensic autopsy study of 520 individuals found that in people under 40, the positive predictive value of the crease for coronary artery disease was as high as 80 percent.¹² A young person with a diagonal earlobe crease is more unexpected than an older person with one, and that unexpectedness is precisely what gives it clinical signal. In the Chinese population study, sensitivity was lowest in the under-45 group, meaning fewer young heart disease patients had the crease, but the positive predictive value was highest in that same age group, meaning that when a young person did have it, it was more likely to mean something.² In older adults, particularly those over 75, specificity dropped, which makes sense because by that age many people have developed the crease regardless of their cardiovascular status.

The Metabolic Syndrome Link

The crease does not appear to be linked solely to the arteries feeding the heart. Research has tied it to metabolic syndrome, the cluster of conditions including abdominal obesity, high blood sugar, elevated triglycerides, low HDL cholesterol, and high blood pressure that together amplify cardiovascular risk. In a Korean cross-sectional study, the risk of metabolic syndrome was significantly higher in people with the crease after adjusting for conventional cardiovascular risk factors.¹¹ Interestingly, the crease in the Chinese study predicted coronary artery disease but was not independently associated with hypertension, diabetes, or high cholesterol individually, suggesting the crease tracks atherosclerosis more directly than the individual metabolic risk factors that feed into it.²

Why the Crease Forms at All

The biological mechanism behind Frank’s sign remains somewhat uncertain, but the leading theory involves the loss of elastic fibers. The earlobe has a rich blood supply and is made up largely of connective tissue and fat, with elastic fibers providing structural support. In atherosclerosis, the same process that stiffens and damages arterial walls may also degrade the elastic fibers in the earlobe. As these fibers break down, the skin loses support and collapses along the line of least resistance, which runs diagonally across the lobe.

The telomere finding mentioned earlier supports this idea: if cells throughout the body are aging more rapidly, you would expect to see degradation in both vascular tissue and the connective tissue of the ear simultaneously. The crease, by this logic, is not causing heart disease or being caused by it. Both are downstream effects of the same underlying vascular and connective tissue deterioration. Some researchers have even found that the crease appears in Renaissance-era paintings of elderly subjects, suggesting that whatever drives the trait has been part of human biology long before modern risk factors like processed food and sedentary lifestyles.¹³

What You Should Do If You Notice One

If you spot a diagonal crease on your earlobe, there is no reason to panic, but there is reason to pay attention. The crease by itself does not mean you have heart disease. It means your risk profile may deserve a closer look, particularly if you also have other risk factors like a family history of heart disease, high blood pressure, smoking, or elevated cholesterol.

Some clinicians advocate including a quick earlobe check as part of routine cardiovascular examination, since it costs nothing, takes seconds, and requires no equipment.¹⁴ Others have argued the sign should prompt earlier or more aggressive screening in patients who already have some cardiac history.¹⁵ At present, though, no professional cardiology society has formally incorporated Frank’s sign into screening guidelines. Its accuracy is too variable, and the risk of unnecessary anxiety or testing in otherwise healthy people remains a concern.

The most reasonable approach if you are under 50 and notice a clear, deep, bilateral crease is to mention it to your doctor and use it as motivation to address modifiable risk factors. If you are over 65 and see the crease, it is less informative on its own, since many people your age will have it without any cardiac issues. Either way, the crease is a prompt for conversation, not a diagnosis.

Frank’s Sign in Forensic Medicine

One area where the crease has found a practical niche is forensic pathology. When a medical examiner investigates a sudden, unexplained death, the presence of a diagonal earlobe crease can help guide suspicion toward a cardiac cause before the body is even opened. The autopsy study of 520 cases found that the crease was the strongest independent risk factor for coronary artery disease and sudden cardiac death apart from age and body mass index.¹² The forensic pathology study that assessed diagnostic accuracy in fatal cases found that Frank’s sign had high specificity for fatal coronary artery disease, meaning that when the crease was absent, fatal heart disease was much less likely to be the cause of death.⁹

In the forensic context, the tradeoffs of diagnostic accuracy look different. A medical examiner does not need to avoid false positives the way a clinician screening a healthy patient does; they are looking for clues that narrow the field of investigation. A quick glance at the earlobes during the external examination can direct attention toward the coronary arteries during internal dissection, saving time and improving diagnostic yield. This is one setting where the modest accuracy of Frank’s sign becomes genuinely practical.

When the Evidence Gets Thin

Despite more than fifty years of research, there are still important gaps. Nearly all the large studies are observational, meaning they show that the crease and heart disease travel together but cannot prove that one causes or directly predicts the other. The study populations have also skewed heavily toward men and toward specific ethnic groups, raising questions about how well the findings generalize. The crease’s sensitivity and specificity vary so widely across studies that it is hard to pin down a single reliable number for how good the sign actually is.⁷

There are also no randomized trials testing whether acting on the crease, say by screening crease-positive individuals more aggressively, actually improves outcomes. It is entirely possible that the crease identifies people who are already being identified by standard risk-factor assessment. One angiography study found that the crease’s accuracy was comparable to traditional risk factors like smoking and diabetes, not superior to them.³ If the crease does not add much beyond what a doctor already knows from a patient’s blood pressure, cholesterol, and smoking status, its clinical utility shrinks considerably. Some reviewers have put it bluntly: the association with coronary artery disease likely exists, but whether it changes what any doctor should actually do remains an open question.¹⁶

1
PubMed. Why we should be looking for earlobe creases in ENT. A systematic review and meta-analysis of diagonal earlobe crease and coronary artery disease
2
PubMed Central. Diagonal earlobe crease and coronary artery disease in a Chinese population
3
PubMed. The relationship of diagonal earlobe crease (Frank’s sign) and obstructive coronary artery disease in patients undergoing coronary angiography
4
PubMed. A diagonal earlobe crease heralds intracranial carotid artery atherosclerotic plaques on cone beam images, an acknowledged cause of stroke
5
PubMed Central. A Myth Still Needs to be Clarified: A Case Report of the Frank’s Sign
6
Circulation Journal. Diagonal Earlobe Crease are Associated With Shorter Telomere in Male Japanese Patients With Metabolic Syndrome
7
PubMed Central. Diagonal Earlobe Crease (Frank’s Sign) for Diagnosis of Coronary Artery Disease: A Systematic Review of Diagnostic Test Accuracy Studies
8
PubMed Central. Relationship Between Frank’s Sign and Cardiovascular Disease: An Autopsy-Based Study
9
PubMed. Ear-ly Warnings: The diagnostic accuracy of Frank’s sign in fatal coronary artery disease – A forensic pathology study
10
The American Journal of Medicine. Frank’s Sign and Cardiovascular Risk: An Observational Descriptive Study
11
PubMed Central. Association Between Earlobe Crease and the Metabolic Syndrome in a Cross-sectional Study
12
PubMed. The earlobe crease, coronary artery disease, and sudden cardiac death: an autopsy study of 520 individuals
13
PubMed. Palaeopathology of the earlobe crease (Frank’s sign): New insights from Renaissance art
14
PubMed Central. The importance of inspection in clinical cardiology: Frank’s sign
15
PubMed Central. Warning Function of Frank’s Sign in Pre-Existing Cardiac Disease Patients: A Case Report
16
PubMed Central. Ear lobe crease: a marker of coronary artery disease?