Visceral pain has many characteristics. The internal organs of the human body have many nerves that are diffusely distributed, and visceral pain can occur when there is ischemia, inflammation, spasm, etc., or when there is mechanical strain on the internal tissues and organs. The main characteristic is that it is diffuse, inaccurate in localization, and cannot pinpoint the exact location of the pain. Visceral pain is often accompanied by other physical symptoms, such as nausea and vomiting, and can even cause symptoms of the cardiovascular system, as well as depression. Visceral pain can cause discomfort in other more distant parts of the body, such as angina pectoris, which can spread to the left shoulder and left back and manifest as sore throat and toothache, all of which require vigilance and prompt medical consultation if necessary to avoid delaying the condition.