Mildly elevated foci on a bone scan are usually not serious if they are caused by inflammation, or more serious if they are caused by, for example, bone tumors or bone metastases. Bone scans are generally used to check for systemic bone diseases and tumors with bone metastases by injecting radioactive isotopes that are scanned to detect areas of abnormal concentration. Mildly elevated foci on bone scan, if caused by inflammation, such as osteoarthritis, etc., are generally not serious, and after standardized treatment, most patients can return to normal life and work; if it is a bone tumor or bone metastasis, which may be benign or malignant, the situation is more serious. If it is diagnosed as mildly elevated foci on bone scan, early standardized treatment is recommended to reduce the adverse effects of the disease.