Loss of Focus
Stress is a nonspecific response of the body to any demand made upon it which results in symptoms such as rise in the blood pressure, release of hormones, quickness of breath, tightening of muscles, perspiration, and increased cardiac activity.
Stress is not necessarily negative. Some stress keeps us motivated and alert, while too little stress can create problems. However, too much stress can trigger problems with mental and physical health, particularly over a prolonged period of time.
Any experience that taxes an individual's energy or well-being; stress may be physical, mental, or emotional.
Tension (Psychology): a state of mental or emotional strain or suspense; "he suffered from fatigue and emotional tension"; "stress is a vasoconstrictor".
Physics: Force that produces strain on a physical body; "the intensity of stress is expressed in units of force divided by units of area". Mental or physical tension that results from physical, emotional, or chemical causes.