Article from the UK about the health effects of bullying. If someone tells you that it's only words, and to just deal, show them this link.
"Stress is a known risk factor for heart disease and indeed research indicates that those who have been bullied are more likely to develop cardiovascular problems; in one study the odds of a worker who was bullied developing heart disease was more than twice that of someone who wasn’t bullied. This may relate to the fact that stress raises blood pressure, cholesterol levels and inflammation within the body, all of which contribute to heart disease risk. "