Plum nucleus qi (similar to pharyngeal allodynia) can cause chest tightness and pain. Plum nucleus qi refers to a foreign body sensation in the pharynx, such as the obstruction of plum nuclei, which cannot be clucked out or swallowed. In Chinese medicine theory, the main pathologies of plum nucleus qi include liver qi stagnation, phlegm-dampness inter-conjugation, and affective disorders (emotionally unsettled). In the early stage of Meibei Qi caused by phlegm-dampness inter-conjugation, there is a feeling of foreign body obstruction in the throat, which travels up and down in the throat or in a fixed position in the throat. With the development of Meibei Qi, the discomfort in the throat will be transferred to the chest and lungs, resulting in chest tightness, vague pain and shortness of breath. The occurrence of plum nucleus qi is mostly related to emotional factors, so it is necessary to actively adjust the mind in daily life. If discomfort occurs, please consult a doctor in time, do not self-treatment.