05/05/2025
Ever wonder how the body actually processes stress? To kick off Mental Health Awareness Month, we're sharing key info behind the physiology of stress!
Stress is the body's physical, mental, and emotional response to a stressor or a change requiring adaptation.
A stressor can be:
• External stimuli, like a loud noise
• Daily events, such as losing your keys
• Academic or work events (e.g. an important assignment)
• Social events
• Exposure to drugs or alcohol
• Psychological, like an interpersonal conflict
There can be positive stress, or eustress, that makes a person motivated and alert, but there's of course negative stress, or distress, which causes anxiety and can lead to poor performance.
How a person responds to a stressor depends on the individual's coping mechanisms. Some folks may feel irritable, tense, or helpless. Concentration and memory may also be affected. In terms of physiology, there three stages of stress response: the alarm, the resistance, and the exhaustion stages.
The alarm stage refers to the body's initial reaction when activation of the sympathetic nervous system occurs to maintain the body functions that enables responses.
During the resistance stage, hormones such as cortisol and epinephrine are continuously released to stimulate the sympathetic nervous system in order to continue engaging the body.
Finally, in the exhaustion stage, the body is no longer able to maintain increased sympathetic nervous system activities. Persistent stress can make a person susceptible to social withdrawal, substance abuse, aggressive behavior, suicidal ideation, or other mental health disorders.