Multiple myeloma is a cancer that develops in a type of plasma cell called a white blood cell. Plasma cells help you combat diseases by developing germ detecting and destroying antibodies. Multiple myeloma allows the cancer cells to build up in the bone marrow, where healthy blood cells are squeezed out. Instead of generating useful antibodies, the cancer cells produce abnormal proteins which can cause complications. Multiple myeloma care is not necessarily appropriate for people who have no signs or symptoms. There are a variety of therapies available for people with multiple myeloma that need medication to help manage the disease.