If it shows the entire sole of our foot with little to no curve on the inside, it means you have low arches or flat feet and tend toward over-pronation (your feet roll inward).

如果脚印描出你的整个脚底，内测几乎没有任何曲线，就表示你的足弓较低或属于扁平足，倾向于过度内旋(你的脚往内翻)。

youdao

There is a wart-like lump on the sole of right foot.

我右脚底有个像肉疣般的硬块。

youdao

There is a wart-like lump on the sole of my right foot.

我右脚底有个像肉疣般的硬块。

youdao

And it is extremely insulting to point the sole of one's foot at another person, even if it is done unintentionally while sitting and chatting informally.

NPR: Sergeant Notes Odd Rituals of War in Afghanistan

Without standing, he lifts his left foot and drags a brittle friction match across the sole of his boot, then watches the red tip flare and expire in the chill wind before he can transfer the flame.

NPR: Excerpt: 'Woodsburner'