I have rather large lumps on top of both feet. they are hard and very painful. when i tap on them they send tingles across the top of my feet. ?

See a Podiatrist: Unless we can see them is difficult to know what could be. One possibility is lipoma ( growth of fatty tissue). Other possibility neuroma ( a growth of a nerve). I cannot rule out fluid from congestive heart disease, or other conditions. My suggestion...Go to see a foot specialist (podiatrist).

Ganglion cysts: Gangion cysts are caused by tears in the tendon sheath or joint capsule allowing lubricating fluid to escape and fill up like a balloon. In certain locations they may put pressure on nerves which cause shooting pain and tingling. They can be aspirated however they usually return unless surgically removed.