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Effects of Stress on The Human Body

  • Writer: Anika Shetty
    Anika Shetty
  • Mar 26
  • 2 min read

Stress is one of the body's natural responses to challenges and danger. In small amounts, stress has the capability of improving concentration, ability to concentrate, and performance levels. On the other hand, if stress is experienced repeatedly or for a longer period of time, it can affect both the physical and mental health of a person. 


When someone experiences stress, the body goes into "fight or flight" mode and releases hormones (adrenaline and cortisol) to prepare itself for immediate action. While increasing heart rates, blood pressure, and energy levels are useful in a smaller situation, stronger activation may have negative effects. 



Chronic stress can hugely affect cardiovascular function. Repeatedly elevated heart rates and blood pressure increases the odds of developing cardiovascular disease or suffering a heart attack. Furthermore, the increased stress placed on blood vessels can cause long-term problems. 


Stress can weaken a person's immune system if they're under chronic stress, making it more likely that they will get sick or disease. Stress can increase the functioning of the immune system in short terms but chronic stress will weaken it, especially of those who are under constant stress than they would be usually. This is one of the reasons that people who experience chronic stress are more prone to illness.



Stress can also have an effect on the digestive system. For example, each time someone experiences high stress levels, they can develop gastrointestinal issues like stomach pain, or indigestion, eat too much or lose their entire appetite. In the long term, stress can lead to much more serious digestive/bowel problems like irritable bowel syndrome (IBS). 


Stress has a high level of influence on a person’s brain due to the increased amount of the hormone known as cortisol, which has a negative effect on memory, concentration level, and overall mood. Stress has an equally close connection with a range of mental health issues such as depression and anxiety. Moreover, chronic stress can impact sleep patterns resulting in reduced energy levels and worse quality of life.



In addition to the physical impact from a stressful situation, stressing causes a significant behavioural impact, such as poor eating habits, lack of physical activity, increased use of drugs and alcohol. These behaviours then create continued or increased negative impacts on the body.


The point is that while stress may be an usual and often helpful type of reaction, there can also be many negative physical effects caused by long-term stress, or chronic stress, such as problems with the heart, immune system, metabolism, mental functioning, and behavior. It is therefore necessary for a person to manage their levels of stress through good lifestyle habits, relaxation techniques, and support, in order to maintain their physical and emotional health. 


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