There are a number of medical and non-medical reasons behind shortness of breath. One can experience breathlessness while being at high altitudes, or when the air quality is at a dangerous level, or when the temperature is too high or even after doing a heavy workout.
There are several medical conditions that trigger breathlessness in an individual. Issues like allergies, asthma, heart problems, pulmonary disease, pneumonia, obesity, tuberculosis also cause dyspnea.
Recently, COVID is also said to be affecting the breathing ability of patients. Many people who have typical COVID symptoms like sore throat, runny nose have also experienced breathing problems during the infection.