With SCS, a small implanted pulse generator (or IPG) and thin wires (known as leads) are placed into the body. To manage your pain, the leads deliver tiny pulses to the nerves that mask pain signals traveling to the brain. Some patients say SCS feels like a gentle tingling or fluttering sensation that replaces the pain. The medical term for this is "paresthesia". But the feeling is different for everyone — and people differ in the amount of pain relief they receive with SCS therapy.