Paramedian CESI vs Selective Nerve Root PRF for Lower Cervical Radicular Pain

Inclusion Criteria: * Severe unilateral radicular pain due to cervical disc herniation (pain with a severity of 6 or more on a numeric rating scale of 0-10) * Continued pain for more than 3 months * Demonstration of herniated disc compression of the lower cervical spinal nerve roots on magnetic resonance imaging * Failure in pain management with conservative methods such as analgesics and physical therapy Exclusion Criteria: * Pain radiating to both arms, hands or neck pain in the foreground * Spinal stenosis or spondylolisthesis (only those with radicular pain due to disc herniation will be included) * Cognitive impairment * Hepatic or renal insufficiency * Severe psychiatric illness * Local or systemic infection * Coagulopathy