Feeling air in the back and pain in the string should be further examined to clarify the diagnosis. Some patients, such as young people, may be caused by spontaneous pneumothorax, which is not only painful but also accompanied by obvious symptoms of chest tightness, and the diagnosis can be confirmed by chest X-ray or chest fluoroscopy. Mild cases can be treated conservatively with oxygen, anti-inflammatory drugs, oral roxithromycin, or cephalexin tablets, etc. In severe cases, further surgical treatment is required and appropriate respiratory function exercises are also required. In addition, there are some patients who suffer from diseases of the chest wall, such as intercostal neuralgia, which can cause localized pain that is aggravated by activity, and in this case, oral pain medications can also be taken. If the pain is not relieved, further examination should be done as soon as possible.