The pain, similar to an electric shock, is caused by irritation of the sciatic nerve, one of whose roots is compressed between two vertebrae. It radiates in the buttocks, along the thigh, to the tip of the foot. Most disc sciatica can regress spontaneously. However, as per Sciatica Pain Treatment Nj , it is necessary to be patient because if many disappear in 2 weeks, some take up to 6 months to be resorted.