# 1.1 Stress

    In medical terms stress is described as, "a physical or psychological stimulus that can produce mental tension or physiological reactions that may lead to illness." When you are under stress, your adrenal gland releases corticosteroids, which are converted to cortisol in the blood stream. Cortisol have an immune suppressive effect in your body.

    According to Richard S Lazarus, stress is a feeling experienced when a person thinks that "the demands exceed the personal and social resources the individual is able to mobilize."

   Stress symptoms commonly include a state of alarm and adrenaline production, short-term resistance as a coping mechanism, and exhaustion, as well as irritability, muscular tension, inability to concentrate and a variety of physiological reactions such as headache and elevated heart rate.