How it makes you feel:
In the heat of the moment, your pulse rate and breathing increase, your pupils and blood vessels dilate, and you may shake with rage. If you argue frequently, you put yourself at risk for cardiovascular disease.
Why: “Fights and arguments stir up the amygdala, and through it, the sympathetic nervous system, and for some people the hypothalamic pituitary axis,” says Dr. Arden. “Both result in the release of stress chemicals, cortisol, norepinephrine, and adrenalin.” This fight-or-flight reaction puts undue stress on the heart, and when it happens regularly, spells bad news for your long-term well-being. Maybe that's why hostile people tend to seem unhealthy.