Tumors can cause osteoporosis. For example, multiple myeloma can cause osteoporosis. In addition, some tumors need to take anti-tumor drugs after treatment, most commonly after breast cancer surgery, many patients are being treated with drugs such as letrozole, and this type of drug can cause osteoporosis. Many patients will experience bone pain and peripheral aches and pains. Even though the diagnosis does not meet the criteria for osteoporosis, the indicators of bone metabolism have clearly warned of a very rapid rate of bone calcium loss and the need for anti-osteoporosis treatment. Many oncology patients will suffer from osteoporosis at the same time and need to go to an osteoporosis specialist for a clear diagnosis and guidance on treatment. Each person is different and each person’s disease is different. A comprehensive treatment plan will be issued based on the patient’s blood index, X-ray examination, bone density index, etc. It is recommended to seek a specialist for specialized diseases and a specialist in osteoporosis for osteoporosis problems.