Deep breathing, which is a combination of chest and abdominal breathing, involves a deep inhalation followed by a deep exhalation. Correct deep breathing, first of all, to keep the whole body relaxed, keep a stable mind, if necessary, can keep quiet for about 15 minutes. Then maximize the deep inhalation, first make the abdomen expansion, then chest expansion, and finally make the lungs try their best to be able to expand to the maximum state, hold for a few seconds, and then slowly exhale, the gas in the lungs slowly exhaled. You can go back and forth and repeat the deep breathing exercise. The benefits of deep breathing are that it can bring relief from tension and anxiety, help eliminate fatigue and tension, and help exercise lung function. The harmful effects of deep breathing may cause violent contraction of cardiovascular vessels, induce cardiovascular disease, or produce hyperventilation syndrome. Therefore, occasional deep breathing will produce some benefits to the organism, but frequent and intense deep breathing may have adverse effects on the organism. In case of respiratory discomfort, it is recommended to consult a doctor in time to avoid delaying the condition.