This study looks at how well low-dose radiotherapy helps with bone pain in people with multiple myeloma, a type of cancer that affects the blood and bone marrow. *Radiotherapy* uses high-energy rays to kill cancer cells and shrink tumors. This study is testing a low dose (2 Gy) given over two days to see if it helps with pain and has fewer side effects than standard treatments.

• Participants will get radiation therapy over two days and have follow-up visits at 2, 4, and 8 weeks, and 6 months after treatment.
• Patients should have multiple myeloma with painful bone spread, but cannot have had prior radiation or surgery on the painful area.
• Study checks include pain relief, quality of life, and less pain medicine use.

Those in the study must be able to understand and agree to join by signing a consent form. It's important that they haven't had prior radiation on the painful bone and are not pregnant. This study may provide a more convenient, less disruptive, and potentially safer way to manage bone pain in multiple myeloma patients.