African American Woman Age 27 Dark Discoloration On Right Foot

african american woman age 27

dark discoloration on right foot and ankle, two shades darker than normal complexion, tiny bumps underneath, from time to time if i bump my foot where the discoloration is, it hurts, but soon goes away. Been having this discoloration for about 5 to 6 years and it has spread over the years. A doctor said it was foot fungus and to put lotromin cream but it isn't working.