Shock feeling on foot, when i touch a vein at top of foot, i feel the shock further down my foot towards big toe. ?

Shocking.: Sounds like a neuralgia type problem. The nerve on the top of the foot has been damaged or irritated and is sending impulses down the nerve route when stimulated. You need to consider just what may have irritated the nerve. Could be something as simple as an ill-fitting shoe. If the condition does not improve, a visit to the doctor may be helpful. Heat/cold and topical patches can be helpful.