text: If you are talking cancer with brain mets, this means that the cancer has spread to the brain area.  It may or may not hurt depending on the symptoms or where the cancer is first located in the body.  If there are tumors in the brain you may experience some headaches, vision changes, dizziness or balance problems, or neurological changes with numbness and tingling in the hands and feet or limbs of the body. It may have paralyzing limb changes, speech changes, memory changes, and stroke like symptoms as well.  This also depends on the staging of the cancer that the doctor decides with further testing, such as CT scans, MRI's and blood tests.  The mets ususally means metastasized, that it is more advanced and has originated in a different spot in the body to begin with.