Stress is your body’s way of responding to any kind of demand or threat. When you sense danger—whether it’s real or imagined—the body’s defenses kick into high gear in a rapid, automatic process known as the “fight-or-flight” reaction, or the stress response.
The stress response is the body’s way of protecting you.
When you feel threatened, your nervous system responds by releasing a flood of stress hormones, and including adrenaline and cortisol, which arouse the body for emergency action. Your heart pounds faster, muscles tighten, blood pressure rises, breath quickens, and your senses become sharper. These physical changes increase your strength and stamina, speed your reaction time, and enhance your focus—preparing you to either fight or flee from the danger at hand.
Feeling stressed can feel perfectly normal at some point of time or other. You might notice that sometimes being stressed-out motivates you to focus on your work, yet at other times, you feel incredibly overwhelmed and can’t concentrate on anything. While stress affects everyone in different ways, there are two major types of stress: stress that’s beneficial and motivating — Eustress; and stress that causes anxiety and even health problems —Distress.