I notice small brown spots on very bottom of my feet what causes this and how do start attacting whatever is causing that to occur?

May need a doctor. If a person gets small brown spots on the bottom of his feet, sometimes they are warts. Other times they are a fungus. If fungus, twice a day over-the-counter lotrimin (clotrimazole) af for 2-3 weeks may solve the problem. If warts, a primary care doctor or dermatologist will likely have to freeze them off. A visit to the doctor can help get a diagnosis, and see if the spots aren't something else.
Get seen. These lesions would likely need to be examined and more history obtained to be able to provide you with useful input about the diagnosis or possible treatment.