Early stage lung cancer usually does not cause sacral pain. Early stage lung cancer is limited in nature, the cancer cells only exist in the lung organs, and there is no metastasis to lymph nodes, distal organs or bones, so it will not have obvious symptoms. Only some patients will be accompanied by slight cough, chest tightness, chest pain, etc., but generally there will not be sacral pain. A small number of lung cancers with high malignancy, such as small cell lung cancer, have skeletal metastasis at an early stage. If the metastasis reaches the sacrum or the surrounding tissues, the patient may have sacral pain under the tumor extrusion and invasion, but it is rare, and most of them appear in the middle and late stages.