Stress is defined as a feeling of tension that can be both emotional and physical. Emotional stress usually occurs when situations are considered difficult or unmanageable. Therefore, different people consider different situations as stressful. Physical stress refers to a physiological reaction of the body to various triggers. The pain experienced after surgery is an example of physical stress. Physical stress often leads to emotional stress, and emotional stress is frequently experienced as physical discomfort (e.g., stomach cramps). Stress management refers to various efforts used to control and reduce the tension that occurs in these situations. (See also Stress in childhood.)