Deep breathing does not normally cause hyperventilation. Hyperventilation refers to excessive ventilation, which is a disease symptom that exceeds the body’s normal physiological function of metabolism, leading to excessive carbon dioxide discharge in the body, thus making it easy for respiratory alkalosis. Deep breathing is a normal physiological function, by increasing the depth of breathing, in order to discharge residual gases in the lungs, metabolic waste, and absorb more fresh air, thereby improving the function of the organs. Deep breathing does not usually cause over-breathing, and the primary causes of over-breathing include chronic obstructive pulmonary disease and acute heart failure. If over-breathing occurs, it is recommended to go to the hospital in time to find out the cause of the disease and have regular treatment as soon as possible.