White circular spots on feet?

it started 2 weeks ago when i wore my boots to cut the gr (they are 2-3 old and kinda snug) my feet hurt when i took the boots off then the next day i had this white circular spot on my baby toe after i took a shower it got soft and i peeled it off then tonight when i got out the shower i was putting on socks and at the bottom of my foot was a white circular spot the size of a dime like where the toes connect to the feet i peelled it off and its like a clear yellow with what looks like finger prints