Small reddish brown splotchy spots on top of both feet. Not raised nor itchy and under skin. No pain or anything, just looks concerning. Any ideas?

Splotchy. These lesions would need to be examined, a history obtained & other tests may be necessary in order to diagnose them. Usually the lesions needs to be identified to determine the solution.
Rashes. rashes and skin lesions are tough to diagnose over the computer if not impossible. Have the area looked at by your Dr. to get an official diagnosis and assure it is not something that needs to be treated.