Initial Localization of Acute Dyspnea What is meant by dyspnea? Simply put, it is a change in the rhythm and/or frequency of breathing. It is a symptom, not a specific disease. This is because symptoms of dyspnea can occur in a variety of diseases throughout the body. For example, heart disease, anemia, etc. However, the most common form of dyspnea is also mostly caused by respiratory disorders. Although all parts of the respiratory system will appear common symptoms of dyspnea, but different parts of the anatomical and physiological differences, it is bound to have its different characteristics. For example, if the respiratory distress is caused by nose obstruction, as long as the mouth is open to breathe, the respiratory distress will be automatically relieved; if the respiratory distress occurs in the pharynx, use the hand to lift up the jaw (i.e., chin) and move it forward, the respiratory distress will be significantly relieved; if the respiratory distress is caused by laryngeal lesions, it is generally accompanied by changes in the voice, such as hoarseness and laryngeal tinnitus. These different parts of the respiratory distress in addition to their own characteristics, there is a common feature: the typical inspiratory dyspnea, which is characterized by: inhalation dyspnea aggravated, inhalation time is prolonged, but the frequency of inhalation does not increase or even reduce, both sides of the ribcage, the upper fossa of the sternum, the fenestrae of the sword there will be a clear depression in the inhalation. Dyspnea caused by lung diseases, especially asthma, “old slow breath” and other diseases are mostly expiratory difficulty, that is, difficulty in expiration and prolonged expiratory time. Therefore, in our daily life, once encountered with acute dyspnea, according to the above introduction, we can initially determine the occurrence of the site. Breathing difficulties that occur in the larynx and above the larynx, if it progresses rapidly, it is necessary to go to the doctor in time, otherwise there will be the possibility of asphyxiation, and then there will be a danger to life.