The person is in the first stage of Seyle's stress hypothesis known as "alarm". In this state the body is preparing for the stressor that they have come across or encountered. The parasympathetic nervous system is activated and the body is in a "fight or flight" mode. Hormones (cortisol and adrenaline) are released into the body to help the body fight the stressor.
According to Seyle's stress hypothesis there are three phases that a person can experience: the alarm reaction, the resistance stage and the exhaustion stage. In this case the person is in the resistance stage because this person is reacting to stress.
