Great auricular nerve blocks have emerged as a valuable diagnostic and therapeutic tool in the management of various head and neck conditions. The great auricular nerve (GAN) is a sensory branch of the cervical plexus, originating from the cervical spinal nerves C2 and C3. It provides sensory innervation to the skin over the external ear, parotid gland, and angle of the mandible. By targeting the GAN with local anesthetic blockade, clinicians can assess the involvement of this nerve in patients with pain or dysfunction in the corresponding distribution. Furthermore, GAN blocks can offer effective pain relief for surgical procedures or chronic conditions affecting the innervated areas.