A faint diagonal line on the earlobe may be louder than a racing heartbeat. Called Frank’s sign in cardiology literature, this small crease has repeatedly been tied to higher rates of coronary artery disease and sudden cardiac events, even when standard symptoms like chest pain are still absent.
The unsettling idea is that skin can betray what arteries hide. Studies using coronary angiography and carotid intima–media thickness show that people with a pronounced earlobe crease more often harbor significant atherosclerotic plaque and endothelial dysfunction, suggesting shared microvascular damage affecting both facial tissue and coronary circulation.
Skeptics argue it might just mirror age or smoking. Yet research that adjusts for blood pressure, cholesterol, diabetes, and tobacco exposure still finds an independent association, particularly when the crease is deep and bilateral, which hints at a structural signal rather than a cosmetic quirk or simple marker of lifestyle.
The practical takeaway is blunt. An earlobe crease is not a diagnosis, but it is a cheap, visible prompt to scrutinize blood pressure, LDL cholesterol, glucose, and family history, and to consider earlier electrocardiography or stress testing in someone whose only obvious warning sign may be etched into the side of the face.
