Neck Injection Complications: Left Arm Pain and Choking Sensation

Post‑injection left arm pain and choking sensation suggest possible involvement of neurovascular structures in the cervical region:

• Nerve irritation/compression: Injection near brachial plexus roots (C5–T1) can radiate pain to the arm.
• Muscle spasm: Local trauma triggers cervical paraspinal spasm, compressing nerves/vasculature.
• Vascular compromise: Rare; hematoma or inadvertent arterial injection may compress subclavian/vertebral vessels.
• Allergic reaction: Angioedema, bronchospasm, or laryngeal edema causing throat tightness.

Immediate medical evaluation is required to differentiate benign irritation from serious complications (e.g., expanding hematoma, anaphylaxis, nerve injury). The injecting clinician should assess promptly.