Increased bone density is not necessarily cancer. There is no clear relationship between increased bone density and cancer. Although cancer is a malignant tumor, and the onset of the disease may lead to bone growth and increased bone density, cancer is only one of the causes of increased density. Increased bone density may also be caused by congenital skeletal dysplasia, as congenital skeletal dysplasia can lead to fractures, osteochondrosis thus causing proliferation within the bone marrow, and ischemic necrosis, which leads to compression of the bone, calcification, and deposition of abnormal minerals within the grains, all of which can lead to a significant increase in bone density. Cancer can present with increased bone density, but it is not the only cause. Therefore, if a patient’s examination indicates increased bone density, he or she should go to a regular hospital in a timely manner, follow the specialist’s diagnosis and treatment advice, make a clear diagnosis, and standardize the treatment.