A chronically high heart rate, even during periods of inactivity, does not automatically mean your teen is ill or using illicit drugs. Although marijuana, cocaine and other drugs can increase your teenâs resting heart rate, anxiety and overconsumption of caffeine can also elevate her resting heart rate to active levels.
Phantom smells, like burnt toast and burning hair, can be a sign of a stroke, but they can also be a sign of other conditions, explains NBC News. A tumor can also cause people to experience phantom smells, as can an infection in the brain. Keep Learning.
Smelling burnt toast (when there's no actual bread burning) is  called an olfactory hallucination.    It is possible to experience olfactory hallucinations when you haâ¦ve  a brain abnormality, such as a brain tumor, or if you are about to  experience a seizure or a stroke.