Why does the little finger of the foot have two nails?

This is a kind of racial inheritance. Many people are like this, so am I.

Toe webbed, also known as "compound nail" and "webbed nail", is medically called petal nail.

There is a widely circulated legend that Shanxi people take off their socks to check their nails: there is a traditional saying in Shanxi that they take off their socks to check their nails. According to legend, more than 600 years ago, Zhu Yuanzhang was in charge of the world and decided to move Shanxi people with a large population to the south. Immigrants gathered under the big locust tree in Hongdong County, making it difficult to leave their homeland. The soldiers cut a knife on everyone's little toenail, so that they could recognize their ancestors and return to their ancestors in the future. However, those who have cracks or cracked toenails are relatives.