The symptoms of lumbar pain with coughing up blood can be considered for the following reasons: First, the spread of lung infection to the lumbar spine, due to the emergence of pneumonia, the pus embolus enters into the blood circulation to reach the corresponding lumbar vertebrae, resulting in secondary infection of the lumbar vertebrae, which leads to coughing up blood and lumbar pain, which is due to systemic dissemination of the infection. Second, see the lung tumor, coughing up blood is a common cause of lung tumor, the tumor is easy to lead to metastasis of lumbar vertebrae, resulting in lumbar vertebrae bone destruction, lumbar pain symptoms. Generally speaking, infected patients will have fever, respiratory symptoms are more obvious, lumbar symptoms are mainly pain, dysfunction, the tumor will be accompanied by emaciation, fatigue, night sweating, anemia and other systemic symptoms, it is recommended that patients go to the hospital in time for examination to make a clear diagnosis and actively carry out the treatment.