The signs of breast cancer metastasis to the thoracic spine are mainly pain, swelling and lumps in the thoracic spine area, pathologic fracture and so on. Breast cancer can easily metastasize to the thoracic vertebrae and other parts of the body if treatment is not timely. When metastasized to the thoracic spine, the malignant tissues keep growing and multiplying, and a localized lump will be formed. The mass will cause some pressure on the skin and localized swelling will occur. When the mass presses on the nerves, it also causes pain. In addition, there are pathological fractures, spinal cord invasion and other symptoms appear, compression of the spinal cord, paraplegia may also occur. Once the above situations occur, it is very likely that the breast cancer has metastasized to the thoracic spine. It is recommended to go to the breast surgery department of the hospital as soon as possible to improve CT and other imaging examinations to clarify the severity of the disease. During the period of illness, we should actively cooperate with doctors to receive treatment, so as to prolong the survival time of patients as much as possible.