People react to external stimuli internally, or it is an intrapersonal skill. Stress is an emotional and/or physical reaction to environmental activities and events. People react to external stimuli internally, or it is an intrapersonal skill. Stress is an emotional and/or physical reaction to environmental activities and events.

Some stress helps improve performance by challenging and motivating us.
Many people perform best under some pressure. When deadlines are approaching, their adrenaline flows and they rise to the occasion with top-level performance. To meet deadlines, managers often have to apply pressure to themselves and their employees.

Situations in which too much pressure exists are known as stressors. Stressors are situations in which people feel anxiety, tension, and pressure. Stressors are events and situations to which people must adjust, and the impact of the stressor and how people react depend on the circumstances and on each person’s physical and psychological characteristics.

Too much stress affects your behavior, human relations, and performance. Stress depletes your energy, weakens your brain and relationships, can cause aging and weight gain, weakens your immune system, can ruin your sleep and make you ill, and can even be a cause of death.