I have odd subdermal bumps on my foot. anyclue as to what these might be?

Depends: Depends where they are located. If they are around the sides of the heels, this is piazogenic papules = herniated fat and nothing to worry about. Another possibility are plantar fibromas if on the bottom of the feet. But, you should never full around with "bumps". See a podiatrist or dermatologist.

Small lipomas: It is common to have small dermal bumps inside of the heel and also on the tops of toes.

Many Things: There are several things these could be. Cysts, fibroma, lipomas. Most all of these are benign. If they begin to hurt more or grow larger i would have them checked by a physician. It would be helpful to see a physician now to get a base line on whwere the bumps are now so it will be easier to track them and see if there are any changes to them.