The clinical name of bone marrow cancer is not very scientific, generally speaking, the symptoms of myeloma and multiple myeloma are very many, and they are often more prominent in one aspect, so there is a greater possibility of clinical misdiagnosis. The main symptoms are as follows: 1. The more common and ordinary symptoms are bone pain and some symptoms related to fracture. Bone pain is mainly caused by myeloma cells secreting cytokines that activate osteoclasts and inhibit osteoblasts at the same time, so bone destruction will occur, resulting in bone pain symptoms; The second is that if the bone destruction is very strong, some bone defects can be seen, some can even be seen in some bone defects, in clinical practice, we have also seen the skull bone obviously concave a piece, bone destruction is very strong, and like the thoracic and lumbar vertebrae bone destruction will easily produce compression fracture, compression fracture will produce severe pain, a little activity will feel unbearable pain, these are the manifestations of bone destruction. Many patients with myeloma will have renal impairment, and some of them will progress to renal failure, that is, they have no urine, and they will go to the nephrology department to see a doctor. 3. anemia symptoms, like dizziness, weakness or shortness of breath after activity, go to hematology department; 4. hyperviscosity, like neurological changes, including amyloidosis of the nervous system, which also affects the neurological lesions, there will be dizziness, weakness, tinnitus, hearing loss, and even coma in more serious cases, these These neurological symptoms are also seen in neurology. In conclusion, the development of multiple myeloma is very diverse, and this is one of the reasons why misdiagnosis may occur.