Post-stroke hemiplegic shoulder pain is a common complication that negatively affects upper limb function and quality of life. This randomized controlled trial aims to compare the efficacy and safety of ultrasound-guided pulsed radiofrequency neuromodulation versus ultrasound-guided phenol neurolysis targeting the suprascapular, axillary, and lateral pectoral nerves in patients with post-stroke hemiplegic shoulder pain. The primary outcome is pain reduction, while secondary outcomes include shoulder function, spasticity, range of motion, quality of life, analgesic consumption, and adverse events during follow-up.