The precursors of pubic bone tumor should be discussed in two cases: First, if it is a primary tumor of the pubic bone, most of them are benign tumors, and a small number of patients may show malignant tumors. If it is because of malignant tumor, the patient will have obvious pain in the area of pubic symphysis at the early stage of lesion, mainly stabbing pain and swelling pain, especially the pain can be aggravated during strenuous activities. There is also a special situation that night rest pain will appear, that is, the pain degree is relatively light during the day, but at night when sleeping, the pain in the area of pubic symphysis will be obviously aggravated, and the pain cannot be relieved with the change of body position. Secondly, you can improve the related tumor index screening in time, this method is simple to operate and can detect tumor in time. If because of malignant tumor or metastasis, the precursor of such disease should find the primary lesion, and then take treatment in time.