The bottom of the foot is called the sole or the plantar region.
The foot can be divided into two main areas:
- The sole (or plantar region): This is the part of the foot that makes contact with the ground when you stand or walk.
- The dorsum: This is the top of the foot, facing upwards.
Therefore, when referring to the bottom surface of your foot, you can accurately use either the term "sole" or "plantar region."