Spinal arachnoidicis is a disease characterized by inflammation and scarring of the arachnoid membrane of the spinal cord. There are no data on the actual population-based prevalence and incidence of arachnoiditis in any country, in any of its form. The etiology is complex. Spinal anesthesia has been implicated as one of the causes. Our case is a 59 year old male who presented with obstructive symptoms such as hesitancy, incomplete voiding, weak urinary stream and straining. He was diagnosed with benign prostatic hypertrophy and unde1went transurethral resection of the prostate. After which, patient complained of back pain, perineal paresthesia, numbness spreading over the buttocks down to the soles of both feet, difficulty ambulation, bladder and bowel dysfunction, which were consistent with cauda equine syndrome. MRI of the lumbosacral spine revealed focal enhancement at the canal ofL4-L5 level.