Pneumonia does not usually cause back pain, but when pneumonia is severe enough to cause pleurisy, pneumothorax, etc., it can cause back pain. Pneumonia is an inflammation of the distal alveolar airways and interstitial parts of the lungs. Typical symptoms are coughing, sputum, chest tightness, and in severe cases, dyspnea and shortness of breath, which usually do not cause back pain. However, severe lung infections can involve the chest cavity, resulting in inflammation of the wall pleura, also known as pleurisy, and some patients will also develop pleural effusion next to pneumonia, a condition that can lead to chest pain, chest tightness, back pain, shortness of breath, dyspnea, and so on. Severe pneumonia will also cause lung tissue damage, gas into the pleural cavity, resulting in a state of pneumoperitoneum, increased pressure in the pleural membrane will compress the lung tissue, so that the damaged lung tissue collapsed, this situation will appear pinprick-like or cut-like chest pain, back pain. Pneumonia back pain, you should communicate with your doctor in time, if necessary need to carry out CT examination of the lungs, to further confirm the diagnosis, and for the treatment, do not delay the condition.