A major role in symptom production of lower back pain patient is nerve root inflammation. Sixteen patients who were complaining of lower back pain from various causes, received caudal epidural steroid injections of 20 ml solutions containing triamcinolone acetate of 80 mg and lidocaine hydrochloride of 160 mg.

The results were as follows:

1) Visual analogue scales were checked in preinjection time, immediate postinjection time and three days after the injection of intraspinal steroid. In whole group, they were 72, 14±13.51, 49.64±14.24, and 57.79±17.19 respectively. In root pain group, 62.00±18.63, 37.80±12.79, and 38.80±14.67 respectively. In mixed pain group, 77.78±4.79, 56,22±10.54, and 68.33±4.72 respectively.

2) Visual analogue scale differences between preinjection time and immediate postinjection time of intraspinal steroid were the highest percent in above 30 group.

3) Visual analogue scale differences were checked both between preinjection time and immediate postinjection time and between preinjection time and on the 3rd day of postinjection. In whole group they were 22.50 and 14.35 respectively. In root pain group 24.20 and 23.20 respectively. In mixed pain group 21.56 and 9.45 respectively.