If you notice such a crease on your earlobe, consult a doctor immediately . At first glance, it may look like a simple wrinkle related to aging. But doctors warn: it’s not that harmless. 

In fact, the appearance of this crease has a serious underlying cause, and you need to pay attention to your health if something like this suddenly shows up on your ear.

What it is and why it appears specifically on the earlobe is explained in the link in the first comment  

Dangerous signs aren’t always hidden deep inside the body. Sometimes the body sends a signal right on the surface — and it’s important not to ignore it.

Frank’s Sign is a diagonal crease on the earlobe running at about a 45° angle. At first glance, it seems like just an age-related wrinkle. But doctors warn: it’s not so innocent.

As early as the 1970s, specialists noticed this crease in patients with angina. Later, it was found in people with coronary artery disease, peripheral vascular disorders, and even cerebrovascular problems.

In other words, a small crease can be an external marker of serious circulation disorders.

Scientists suggest that the cause may be a microvascular disease of the middle portion of the ear — an area supplied by terminal arteries. In other words, the ear “signals” a malfunction in the system.

The shape of the sign can vary:

• incomplete crease on the earlobe — the least concerning form;
• complete crease — a more worrying signal;
• creases on both earlobes — the highest risk.

So if you notice such a sign in yourself or your loved ones, don’t delay a doctor’s visit. Better a false alarm than ignoring a warning — because sometimes paying attention to small details can save a life.