Look at the location, it seems to be the location of Yongquan point. Symmetry, which means it should be related to an organ in your internal organs. I suggest you analyze your recent physical condition yourself, or go to the hospital for a comprehensive examination.

Yongquan point, located at the plantar point of human body, is located in the first third of the connecting line between the head end of the second and third toe seam and the heel, and in the depression of the forefoot. It is the lowest point of Shu point in the whole body and the first point of kidney meridian. Huangdi Neijing, the earliest existing medical work in China, said: "The kidney comes from spring, and spring is full of heart." This means that the qi of the kidney meridian is like the source water, which comes from the foot and pours out to irrigate all parts of the body and limbs. Therefore, Yongquan point plays an important role in human health, disease prevention, treatment and health care.