Hyperventilation alkalosis, also known as respiratory alkalosis, may be caused by hysteria, improper use of the ventilator, etc. It can be relieved by giving the patient sedatives as well as adjusting the ventilator. When a patient suffering from dysthymia has a sudden onset of illness, psychogenic hyperventilation is induced, which leads to respiratory alkalosis by decreasing the concentration of carbon dioxide in the alveoli and decreasing the concentration of carbon dioxide in the blood. At this time, a paper bag can be used to cover the mouth and nose, thus enhancing the ineffective lumen of the respiratory tract, which can effectively reduce the exhalation of carbon dioxide, and the patient can also be given sedatives for treatment, such as eszopiclone and alprazolam. For patients on ventilators, overventilation can also occur if the ventilator is not used properly or if the inhaled air volume is set too high, causing severe respiratory alkalosis. Symptoms of hyperventilation alkalosis can be relieved by immediately checking and adjusting the inspired oxygen concentration, respiratory rate and tidal volume. Patients should go to the hospital as soon as they notice an aggravation of symptoms such as shortness of breath and rapid heart rate, and should be treated under the supervision of a doctor.