The mechanism of back pain arising from change in intervertebral disc has not been clearly defined. So that the diagnosis and treatment were variable. The 26 cases of herniated intervertebral discs, treated by surgically, were analysed and evaluated as follows. 1 In 26 cases of herniated intervertebral discs, 18 cases (69%) were male and 8 cases (31%) was female. 2. The most common age group was 30 to 40 years old. 3. The most common site of incidence was L4-5 with 15 cases (57%) and L5-S1 10 cases (38%). 4. The over all followup result to surgical treatment was evaluated as 80% (21 cases) in excellent & good. 5. The end results correlated with myelographic findings was that the lateral indentation and asymmetry of nerve sleeve sleeve groups were better than the hour-glass appearance group.