Does it make sense for a child's arch to grow a mole?

The mole on the foot is the same as the mole on other parts of the body. It is caused by melanin deposition in the body. Don't worry too much. I also have a mole on my foot, which grew about 4 years ago. So far, I haven't found anything unusual. Don't listen to the story of the street fortune teller. If you really feel uncomfortable, go to the hospital for examination.