The researchers looked at 241 stroke patients  Of the 88 patients with systemic strokes, 78 had specific creases on their earlobes, and 112 of the 153 patients with temporary ischemic strokes (commonly known as microstrokes / small strokes) had the same phenomenon
Blockage of arterioles deteriorates blood circulation in the head and neck, caused creases in the earlobe and increased the risk of stroke
 The researchers believe that we should consider adding this kind of crease on the earlobe to the list of risk factors for a typical stroke