What's Stress & Anxiety?

Quoting wikipedia

Stress, whether physiological, biological or psychological, is an organism’s response to a stressor such as an environmental condition. When stressed by stimuli that alter an organism’s environment, multiple systems respond across the body. In humans and most mammals, the autonomic nervous system and hypothalamic-pituitary-adrenal (HPA) axis are the two major systems that respond to stress. Two well-known hormones that humans produce during stressful situations are adrenaline and cortisol.

Anxiety is an emotion which is characterised by an unpleasant state of inner turmoil and includes feelings of dread over anticipated events. Anxiety is different from fear in that fear is defined as the emotional response to a present threat, whereas anxiety is the anticipation of a future one. It is often accompanied by nervous behavior such as pacing back and forth, somatic complaints, and rumination.

Further readings

• Read about stress in the wikipedia
• Read about anxiety in the wikipedia