Stress is an entity belonging to the mental realm, whereas, high blood pressure is an entity belonging to the physical dominion. How could these two conditions interconnect with each other? Stress, on one hand, is the physiological (normal) response to daily activities or to external or internal stimulus that trigger the fight, flight or freeze reaction. These triggers are recognized as stressors that can be either physical or psychological producing the same reaction in your body. For example, the fear of losing a loved one produces the same answers as when you fear losing your job or facing the imminent threat of a dog barking at you.
So what happens at that moment in your body? Under normal circumstances stress hormones such as epinephrine, norepinephrine, glucocorticoids, adrenaline, and antidiuretic hormone are released into blood to give your muscles the strength to be ready for fight or flight. In the case of the antidiuretic hormone its purpose is to keep stable the fluid volume in your body. It follows that by regulating the amount of blood volume this hormone also has a pronounced effect on stroke volume, which is the amount of blood pumped by the heart. Thus, the antidiuretic hormone has a critical role on blood pressure. When in a stressful situation this hormone functions by activating and increasing slightly the blood pressure, which in normal individuals act as a helper to perform better; however, when the lifestyle is stressful and the individual does not know how to cope with the daily life activities then it becomes chronic stress, distress and / or anxiety. Anxiety is a common emotion that is experienced by anyone at some point in life; however, it can affect an individual in negative ways if not deal with properly. Therefore, the increase of vasopressin (antidiuretic hormone) under stressful circumstances out of control will increase blood pressure when someone has already elevated values. Given the seriousness of what stress and anxiety can transform into, it is important that you learn to deal with anxiety in healthy and appropriate ways to benefit yourself and those around you. Each individual's responses are different and can be related to health and stress and may cause a significant impact not only on health but also in the outcome of serious illnesses.
Lastly, stress as perceived as a normal response of the body helps it to perform faster and stronger and becomes a life saver under a life threatening situation that is an immediate reaction; neverheless, chronic stress without control leads the body and the mind to be in a continuing perception of daily events as threats, which in turn, may cause the increasing of blood pressure if you have risk factors for hypertension or already elevated values.