Stress is part of life. Since it can't be excised from the life experience, it is very important to learn how to deal with it. Research shows that it isn't necessarily the nature of the stressor that drives people to dizzying heights of fist-clenching, jaw-grinding, and cold-sweating states of stress and panic. The key factor is one's response to a stressful situation. Different people respond differently to stressors. Overall, the best way to deal with stress is to learn how to work with and around it, rather than trying to master it or make it go away.
Stress manifests itself physically. When facing a stressor, the body responds by switching into "fight or flight" mode. Physiologically, the body is ready to deal with the perceived danger (the stressor). Blood pressure goes up, heart and respiration rate increases, and hormones such as adrenaline are released. The muscles become tensed (some people clench their jaw), head-aches, back pain, stomach aches (ulcers become exacerbated), bad skin and the inability to concentrate may plague a person's day. The extremities become cold as blood is kept in the central part of the body. The immune system is weakened (since the body is concentrating on dealing with the stressor) and a person can become very susceptible to colds, the flue, cold sores, cankers, etc. Evidently stress is a very real and potentially uncomfortable component of life.