There can be a number of reasons for this happening. Anything from pressure on nerves in the back to circulatory disorders. you would be wise to seek the advice of a physician to help you sort this out.
True
Infection is the most likely cause.
it is most likely a blister, caused by running or putting strain on the sole of your foot.
or you may be thinking of your foot arch
The foot is the whole thing where you wear your shoe/sandal. On the under side of the foot, the sole is the front part near the toes and the heel is back part of the foot similar to where we say heel for high heels
The sole of the foot.
Symptoms to tarsal tunnel include a vague pain in the sole of the foot, numbness, tingling, burning or a sensation that may be similar to an electrical shock.
The sole is part of the foot.
Burning sensation on the sole of the foot can be caused by various factors such as nerve damage (neuropathy), muscle fatigue, inflammation, or poor circulation. It can also be a result of wearing ill-fitting shoes, standing for long periods of time, or certain medical conditions like diabetes. If the burning sensation persists or worsens, it is important to consult a healthcare professional for proper evaluation and treatment.
Sole of the foot
The foot is the whole thing where you wear your shoe/sandal. On the under side of the foot, the sole is the front part near the toes and the heel is back part of the foot similar to where we say heel for high heels
It's called the sole of the foot. (Other areas on the sole of the foot are specifically called the ball of the foot, the arch of the foot, toes and heel)