by Arvind Maurya, Psychologist WDPC
We often hear people say, “Tension mat lo, health kharab ho jayegi.” But can continuous stress actually affect our physical health? The answer is more complicated than simply saying that stress causes disease. However, psychology and health research show that long-term stress can influence the body in several ways, including processes related to blood pressure, blood sugar, immunity, sleep, and lifestyle.
This is where psychoneuroimmunology (PNI) becomes interesting. It studies the relationship between psychological processes, the nervous system, hormones, and the immune system. In simple words, it helps us understand how the mind and body continuously communicate with each other.
When we experience stress, the brain perceives a situation as demanding or threatening. The body responds by activating systems that help us deal with the challenge. Stress hormones such as cortisol and adrenaline increase, heart rate rises, and the body becomes ready for action. This response is useful when stress is temporary.
The problem may arise when stress becomes a regular part of life.
Imagine someone who spends months worrying about work, money, family responsibilities, or examinations. They may sleep poorly, eat irregularly, depend more on tea, sugary foods, or alcohol, and stop exercising. At the same time, their body may repeatedly experience stress-related physiological activation. Over time, these factors can contribute to health problems.
What about high blood pressure?
Chronic stress can be associated with repeated increases in heart rate and blood pressure. Stress may also indirectly affect blood pressure through behaviours such as poor sleep, physical inactivity, unhealthy eating, smoking, or excessive alcohol consumption. However, stress is only one factor among many. Genetics, age, weight, diet, physical activity, medical conditions, and other factors also play important roles.
What about diabetes?
The relationship is also not as simple as “stress causes diabetes.” Long-term stress may affect glucose regulation through stress hormones such as cortisol. Chronic stress can also influence eating habits, sleep, physical activity, and body weight. These factors can contribute to insulin resistance and increase the risk of developing type 2 diabetes in susceptible individuals.
This is one reason psychoneuroimmunology is important. It reminds us that mental and physical health are not completely separate. The brain communicates with the body through neural pathways, hormones, and immune processes. Psychological experiences can influence these systems, while physical health can also affect mood, thinking, and behaviour.
So, does stress cause diabetes or high blood pressure?
Not necessarily by itself. It is better to think of chronic stress as one possible contributing factor within a much larger network of biological, psychological, behavioural, and social influences.
The message is not “never take stress.” Stress is a normal part of life. The important question is what happens when stress becomes constant and we do not get enough opportunities for recovery.
Regular sleep, physical activity, balanced food, relaxation, social support, and learning healthier ways of
coping can help protect overall health. And when blood pressure or blood sugar is persistently high, proper medical evaluation is important rather than assuming that stress is the only cause.
Sometimes, taking care of the mind is also a way of taking care of the body.
