answer:No. Not necessarily. They can be indicators. But you would likely be having other symptoms as well, such as headaches (chronic), dizziness, nausea, vomiting, cognitive problems and more… see Mayo Clinic for details There was a PSA series on historic Canadians that had a line in it (about 20 years ago) that suggested an Epileptic would smell burnt toast before the onset of her seizures. This particular vignette was on Dr. Wilder Penifield and Dr. Herbet Jasper and their pioneering research into neurology. Thanks to those Canadian Heritage PSA’s, if anyone in Canada says they smell burnt toast, everyone always asks if they are about to have a seizure.