Stress is the physical and mental response of the body to demands made upon it. It is the result of our reaction to outside events, not necessarily the events themselves. Not all stress is bad. Every individual functions best and feels best at one’s own optimal level of physiological arousal. Certain level of stress is needed to get everyday’s things done. Too little of it can lead to boredom and "rust out" - but too much of it can produce the feeling of being "burned out". Adaptive stress helps one to rise to life's challenges. As such, sometimes, negative stress occurs when an individual’s ability to cope with life's demands crumbles. This is a time or moment to break down the stress chemicals (e.g. through physical activity etc.) in the blood. Otherwise, it will prevent human beings from relaxing. Eventually this results in a permanent state of stress. That initial buzz turns to worry, irritability or panic. Then various challenges of life become threats leading to create a harmful sense of doubt about one’s ability to do even simple things. Thus, even small problems appear insurmountable. Stress must therefore be managed well in time before it goes out of hand.