I had a surgery on my back four years ago, it still hurts and its itchy its also a big scar is it something i should worry about?

Keloid: Keloids and hypertrophic scars can develop at sites of surgery , usually if there is delayed healing after the surgery. Those scars can be treated with steroidal injections , silicon patches , laser or surgery --- seek consultation with a dermatologist.

See spine surgeon: If you are still in pain you must return to your original spine surgeon and have a revaluation. He may also refer you to a pain management specialist and rehabilitation medicine specialist.