9 Factors That Influence Blood Pressure When You’re Unwell

Health is a state of physical, mental, and social homeostasis. When you feel sick, your body undergoes certain physiological and biochemical changes. No matter the underlying cause, it can alter your blood pressure and heart rate to some extent. Moreover, the physiological modifications depend essentially on different internal and external factors. 

Common factors such as the type of medication, the severity of illness, your body’s stress response, and environmental agents play an important role in regulating blood pressure. Here are the top 9 factors that can alter your blood pressure and lead to circulatory disturbances during the time of illness. 

1. Body’s Stress Response 

Most people tend to wonder, “Is blood pressure higher when cold or sick” due to a constant dilemma in such issues. One of the most important factors that governs the rise or fall of blood pressure during an illness is your body’s stress-regulating mechanisms.  

When you are sick, your body undergoes several biochemical changes, which in turn initiate a stress response. Such a mechanism depends upon the sympathetic nervous system and its activation of adrenaline or cortisol release. 

As a result, the complex interplay of hormones can lead to a transient rise in blood pressure during times of illness. However, chronic conditions may predispose your body to dehydration and circulatory disturbances. Furthermore, it might cause a decline in blood pressure following long periods of reduced fluid volume in your body. 

2. Fever or Inflammatory Processes 

Another common reason behind a small rise in your pressure during illness is the underlying inflammation or pyrexia that follows. Fever is your body’s way of dealing with infection and can affect the systolic blood pressure.  

This is because your body experiences circulatory overload during heat dissipation. As a result, it can elevate heart rate and blood pressure for a significant period. 

3. Release Of Inflammatory Markers 

Your body produces some inflammatory markers in response to acute or chronic diseases. Inflammation triggers the infectious pathways to release specific cytokines, chemical messengers that dictate your body’s immune-regulating actions.  

This can influence the vascular tone, making your arteries wider or narrower. Such a fluctuation can lead to temporary spikes in your blood pressure, especially during infections. 

4. Prolonged Dehydration 

When you’re sick, your body is in a state of long-term dehydration and fluid loss. This may be due to various symptoms, such as vomiting, diarrhea, and sweating during a febrile state. These signs and symptoms will make way for a lower blood volume and may take your blood pressure down with it.  

When you have low blood volume, the pressure in your arteries drops, worsening hypotension. Hence, it’s essential to maintain adequate hydration and electrolyte balance for managing mild to moderate illness. 

5. Lack Of Physical Movement 

There is no doubt that resting and reduced mobility are a part of the recovery plan during illness. However, such periods of prolonged inactivity have a significant impact on the circulatory mechanisms, especially the blood pressure. Sitting on your bed for extended periods can cause blood to accumulate in your lower extremities. 

As a result, you may experience a sudden decline in blood pressure when you stand up, which is referred to as orthostatic hypotension. In addition, a lack of physical activity might impair your body’s ability to regulate blood pressure. Hence, it may lead to a temporary rise in blood pressure, especially when you’re sick. 

6. Immune System Activation 

The effect of prolonged illness on your circulation and pressure depends on the activation of defense mechanisms. When pathogens attack your vital organs, your body releases pro-inflammatory cytokines.  

As a result, the body may increase the blood pressure to transport cytokines and immune cells effectively towards the target area. However, severe cases of sepsis might lead to extensive inflammation, thereby causing the vessels to dilate and enter a state of septic shock. 

7. Sleep Disturbances & Fatigue 

Did you know that fatigue and sleep deprivation also significantly affect blood pressure?  

During times of illness, you are bound to experience disturbed sleeping patterns. As a result, it can impact the circulatory mechanisms and activate the sympathetic nervous system. Furthermore, the sympathetic activation increases the resting blood pressure and can reduce the rate of recovery.  

On the other hand, prolonged fatigue or overexertion may reduce blood pressure due to hormonal imbalance. Don’t forget to prioritize adequate sleep during illness to support circulatory function and homeostasis. 

8. Environmental Temperature 

During the period of illness, environmental temperature and the type of illness both play important roles in the rise or fall in blood pressure. During winter, your blood vessels may constrict to preserve heat.  

As a result, it can lead to a temporary rise in blood pressure during times of illness. Such a response mimics when you experience common cold or flu-like illnesses. In such conditions, circulatory changes and stress responses can elevate your blood pressure, resulting in a slight increase above baseline levels. 

9. Emotional Regulation & Anxiety 

Did you know that your body may experience anxiety or stress due to the impact of illness on your mind?  

No matter what the reason may be, worrying about your health can lead to anxiety-induced changes in your blood pressure. This is because anxious thoughts can activate the sympathetic nervous system, leading to increased adrenaline release.  

As a result, your heart pumps faster, which might lead to a compensatory rise in blood pressure. Hence, it’s important to practice deep breathing and meditation to combat the psychological effects of illness. 

Bottom Line 

When you’re sick, your body undergoes several physiological and biochemical changes to combat the underlying inflammation. During illness, several factors, including dehydration, sympathetic activation, and the release of inflammatory cytokines, affect circulation and blood pressure.  

As a result, you may experience temporary rise and fall in your blood pressure due to the diverse biochemical pathways in your body. However, staying hydrated, getting some physical activity, and practicing deep breathing or other relaxation techniques might help address the changes in your blood pressure.