The magical stellate ganglion block The stellate ganglion is formed by the fusion of cervicothoracic sympathetic ganglia and has a star shape, hence the name. The stellate ganglion is located in front of the transverse processes of the cervical 7 and thoracic 1 vertebrae. Stellate ganglion block is a method of injecting local anesthetic into the loose connective tissue of the neck, including the stellate ganglion, to reversibly block the preganglionic and postganglionic fibers of the stellate ganglion and the sympathetic nerves of the head, neck, face, and upper extremities in the area innervated. These sympathetic ganglia innervate cardiovascular motility, glandular secretion, muscle tone, bronchial contraction, and various nerve fibers transmitting nociceptive sensations, which are blocked. This results in vasodilatation of the head, neck, upper limbs and heart, significant improvement of cardiac and cerebral blood flow, enhancement of the body’s anti-disease function and anti-inflammatory effects, regulation of the endocrine system and stabilization of the systemic autonomic nervous system. According to statistics, this method is the most widely used pain treatment method in clinical application in Japan, with about 88% of patients applying stellate ganglion block, and about 50% of the use rate in pain treatment in China. In recent years, many studies have been conducted on the mechanism of action of stellate ganglion block. The results show that the action of stellate ganglion block involves the vegetative nervous system, endocrine system and immune system, and has a mediating effect on the function of these systems. This blocking method helps to maintain the stability of the body’s internal environment and allows the correction of many phytonadic disorders. For example, this method is used to treat primary hypertension and hypotension, hypothermia and hypothermia, hyperhidrosis and anhidrosis, weight gain or loss, hyper- or hypothyroidism, erythrodysesthesia and cyanosis of the extremities, narcolepsy and insomnia, etc., which normalize the disordered functions. As research on stellate ganglia progresses, this method will become an important clinical treatment in the 21st century.