Inspiratory dyspnea is characterized by inspiratory effort and the appearance of the triple concave sign. 1. Inspiratory effort: inspiratory dyspnea is one of the types of dyspnea, which is mainly characterized by the patient’s difficulty in inhaling and prolonged inhalation time. 2. Triple concave sign: more serious inspiratory dyspnea will cause the typical clinical manifestation of triple concave sign. The triple concavity sign means that the supraclavicular fossa, the suprasternal fossa and the intercostal space are abnormally concave inward. The occurrence of inspiratory dyspnea may be caused by upper airway obstruction, acute pharyngolaryngitis, airway foreign body, acute respiratory distress syndrome, laryngeal tumors, etc. Patients need to consult a doctor in time, and carry out systematic and standardized treatment after clarifying the primary disease. Individuals with unusual inspiratory dyspnea should seek prompt medical attention.