Symptoms of brachial plexus neuritis vary because of the many branches of the brachial plexus nerve, but generally severe pain occurs, starting in the clavicle or shoulder on one side and radiating to the upper arm, forearm, or hand. The onset of the disease may be accompanied by fever or numbness in the fingers and weakness in the upper extremities, which may cause many patients to have their limbs droop at the time of the visit, and the patient may hold the affected limb by hand or drape the upper limb to relieve the pain. In this case, the pressure pain in the supraclavicular fossa area will be very pronounced and will be radiating, and the pain will be induced when the arm is raised. Therefore, these symptoms alert us to the possibility of brachial plexus neuritis for any pain in the shoulder and upper extremity that is of varying degrees and very intense.