Talk to Dermatologist on Feet Discolouration

I've noticed that the middle part of my foot has become darker than the rest of my skin, and I think it might be due to wearing shoes frequently. It is not painful, but the skin tone has changed. I would like to know if there is a way to even out the color and restore it to its original tone. Could this be hyperpigmentation from friction or pressure, and what treatment options would you recommend?