Can Dehydration Be a Cause of High Blood Pressure?

By Bridget Reed
Medically Reviewed by:

Johannah Gregg, DNP, FNP-C

Can Dehydration Be a Cause of High Blood Pressure?

May 27, 2024

Have you ever felt unusually thirsty and noticed your heart seems to race more than usual? You might be experiencing dehydration, and it could be subtly influencing your blood pressure. 

At Herbaly, we’re all about the less apparent health aspects impacting our well-being. Staying hydrated seems simple, but its impact on blood pressure is profound and often overlooked. 

Looking to learn more? We’ve got you covered. Read on as we explore how ensuring your water glass is full could be vital to keeping your blood pressure in check.

What Is Blood Pressure?

Blood pressure is a crucial indicator of your vascular health. It measures the force that blood exerts against the walls of your arteries as your heart pumps it around your body.

A blood pressure reading consists of two numbers: systolic pressure, which occurs as the heart beats and pushes blood through the arteries, and diastolic pressure, which is recorded when the heart is at rest between beats. 

Normal blood pressure is usually around 120/80 mm Hg. However, when these numbers climb higher consistently, it can spell trouble, leading to what's known as hypertension, a risk factor for heart and kidney diseases, strokes, and more. 

What Are the Warning Signs of High Blood Pressure?

High blood pressure is often called the "silent killer" because it can progress without obvious symptoms. However, being vigilant about the subtler signs can help you catch and manage high blood pressure early. 

Here’s what to look out for:

  • Persistent Headaches: Frequent, especially morning headaches, may be a sign of elevated blood pressure.
  • Exhaustion or Confusion: Feeling unusually tired or mentally foggy can indicate your brain isn't getting enough blood.
  • Visual Changes: Blurriness or double vision could signal pressure affecting the blood vessels in your eyes.
  • Chest Pain: Experiencing discomfort in your chest, particularly during activities, is a critical sign.
  • Shortness of Breath: Finding yourself out of breath from simple tasks can mean your heart is straining.
  • Heart Palpitations: An irregular heartbeat or feeling that your heart is pounding could be related to high blood pressure.

Recognizing these symptoms is essential for early intervention and preventing more serious health issues from developing. If you notice any of these signs persistently, it’s wise to consult a healthcare provider to evaluate your blood pressure and discuss potential lifestyle changes or treatments.

What Causes High Blood Pressure?

High blood pressure doesn’t appear out of the blue. Instead, it’s the result of several factors weaving together over time. Let's explore what might be nudging your blood pressure upward.

Genetics and Family History

It’s true that high blood pressure can run in families. If your relatives have had issues with hypertension, you might be more likely to face it, too. While you can't change your genes, being aware of this risk can help you focus on what you can influence to keep your blood pressure in check.


As the years tick by, our blood vessels get stiffer and less forgiving when dealing with blood flow pressures. This natural change can make it harder for your heart to pump blood smoothly, increasing pressure on your arterial walls.

Lifestyle Choices

The way you live plays a big part in blood pressure. Not moving enough, eating more salt than our bodies can handle, smoking, or regularly having a few too many drinks can all raise blood pressure. Staying active and mindful of what you eat and drink can positively impact your blood pressure.


If life keeps you in a constant state of high alert, your body may react by ramping up your heart rate and narrowing your blood vessels, which can raise your blood pressure. Finding effective ways to unwind and relax, like meditation, hobbies, or time with loved ones, can help keep those numbers down.


Being overweight makes it harder for your heart to circulate blood, putting extra pressure on your blood vessels. Managing your weight through a balanced diet and regular exercise can significantly lower your blood pressure.

Chronic Conditions

Conditions like diabetes, thyroid disease, kidney disease, and sleep apnea affect overall health and can complicate blood pressure management. Keeping these conditions in check with the help of healthcare providers is imperative for maintaining stable blood pressure levels.

How Does Dehydration Affect Blood Pressure?

Now that we've explored some common causes behind high blood pressure, let's turn our attention to a factor that often flies under the radar: dehydration. It’s easy to overlook, but staying well-hydrated is more connected to your blood pressure than you might think.

Water is crucial for your body to function optimally. It helps your blood vessels work better and maintain a proper blood volume, which is vital for your blood pressure. 

When you're dehydrated, your body responds by tightening up your blood vessels, a process known as vasoconstriction. This reaction is part of why dehydration can lead to a spike in your blood pressure.

Dehydration is more than not drinking enough water. Factors like consuming too many diuretic beverages (those that make you urinate more, like coffee and alcohol), sweating heavily during exercise without replacing fluids, or eating a diet high in salty foods can all lead to dehydration.

What Are Common Signs of Dehydration?

Keeping an eye out for dehydration is critical, especially if you’re trying to manage your blood pressure. Common signs of dehydration include:

  • Thirst, which may seem obvious, but we often ignore it
  • Dry mouth and lips
  • Dry skin
  • Feeling dizzy or lightheaded
  • Less frequent urination than usual or dark-colored urine

Everyone's hydration needs are unique, so listen to your body and adjust your water intake to support your heart health in a way that works best for you.

How Can You Maintain a Healthy Blood Pressure?

Navigating your health can sometimes feel uncertain. Here are some straightforward tips to help you maintain healthy blood pressure and incorporate everyday actions that can have a significant impact:

Embrace the Power of Tea

Starting your day with a cup of green tea can be a calming ritual that also benefits your blood pressure thanks to its heart-friendly antioxidants. 

Our Heart Functional Tea, which is caffeine-free and packed with ten natural ingredients like ginger root, lavender flower, and fennel seed, adds a delightful layer to this healthy habit, supporting normal blood pressure with every sip.

Get Moving

Physical activity is non-negotiable when it comes to lowering blood pressure. It doesn’t have to be a marathon: Even regular walks, yoga, or light cycling can significantly improve heart health. Make exercise a part of your routine, and your heart will thank you for it.

Mind Your Diet

Incorporate more potassium-rich foods like bananas, sweet potatoes, and spinach into your meals. Potassium helps balance sodium in your body, which can help control your blood pressure.

Limit Sodium

Speaking of sodium, too much salt is a no-go for high blood pressure. Flavor your dishes with herbs and spices instead of salt, and be mindful of the sodium content in processed foods. “ The national recommendation for sodium intake is generally 2,300mg daily, which is one teaspoon of table salt,” notes Johannah Gregg, DNP, FNP-C. 

Stay Hydrated

Proper hydration helps keep your blood pressure stable. Make water your best friend, but if you need a little flavor, our Functional Teas can be a hydrating and tasty alternative.

Prioritize Sleep

Never underestimate the power of a good night’s sleep. It helps your body regulate stress hormones and keeps your heart healthy. Aim for seven to nine hours of quality sleep each night. “Sleeping horizontally allows swelling in your extremities to return to your kidneys, allowing for proper circulation, which is crucial for maintaining health,” highlights Johannah Gregg, DNP, FNP-C. 

Go for Regular Checkups

Keep in touch with your healthcare provider and monitor your blood pressure regularly. This simple habit will help you catch any changes early and adjust your health plan as needed.

Smart Sweetening

For those who like a bit of sweetness, opt for healthier alternatives that don’t spike your blood sugar or pressure. Our Organic Stevia Leaf Sweetener is perfect for sweetening your tea, coffee, or breakfast without the extra calories or sugar rush.

The Bottom Line

At Herbaly, we're passionate about empowering you to take control of your health in a natural, enjoyable way. Understanding the link between hydration and blood pressure is just the beginning. 

By staying informed and proactive, you can make choices that enhance your well-being and bring joy and balance to your everyday life. Remember, every sip counts when it comes to maintaining healthy blood pressure.

Explore even more flavors and health benefits with our collection of tea. Designed to support your journey towards a healthier heart, these teas blend natural goodness with heart-friendly ingredients, making every cup a step towards better health.


High Blood Pressure Symptoms and Causes | cdc.gov

Hypertension | World Health Organization

Why High Blood Pressure is a "Silent Killer" | American Heart Association

Know Your Risk for High Blood Pressure | cdc.gov

Age-related Impairment of Vascular Structure and Functions | PMC

Vasoconstriction | MedlinePlus Medical Encyclopedia

Dehydration | NHS

Reducing sodium and increasing potassium may lower risk of cardiovascular disease | Harvard

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