I have black dots on bottom of my feet under the skin... no pain or irritation?

Doctor can evaluate: If a person gets small dark spots on the bottom of her feet, sometimes they are warts. Other times they may be a fungus. If fungus, twice a day over-the-counter Lotrimin AF (clotrimazole) for 3-4 weeks may solve the problem. If warts, a primary care doctor or dermatologist will likely have to freeze them off. A doctor's exam can help get a diagnosis, and see if the spots aren't something else.