A Functional Doc Explains What Your Blood Pressure Is Trying To Tell You

Blood pressure is one of the most common things we check in medicine. It takes less than a minute. A cuff goes on your arm, it tightens, and a number appears. It feels objective. Clear. And most people hear those numbers and have no idea what they actually mean. Either it’s “good” or it’s “high.”

“Most people hear those numbers and have no idea what they actually mean. Either it’s ‘good’ or it’s ‘high.’”

But in practice, it’s rarely that simple. Those numbers have a lot more to say than just a black-and-white answer.

I’ve had patients come into the office with elevated blood pressure readings after rushing through traffic, drinking coffee, or feeling anxious about the appointment itself. I’ve seen those same patients check their numbers at home later that evening and get a completely different result.

So which number is the “real” one?

This is where blood pressure starts to become more than a measurement at the doctor’s office and more of a reflection of what’s happening in your body in that moment.

From a functional medicine perspective, blood pressure is influenced by your nervous system, your stress response, your environment, and even how safe or activated your body feels. That’s why looking at a single reading out of context is rarely helpful.

Blood pressure is a signal your body is sending. And here’s what it’s trying to say.

Blood pressure isn’t just a number

Let’s start with the basics, because the categories do matter.

Blood pressure is a measure of the force of blood moving through your arteries as your heart pumps. The top number (systolic) reflects the pressure when your heart contracts. The bottom number (diastolic) reflects the pressure when your heart relaxes between beats.

“Why does this matter? Because that pressure is what delivers oxygen and nutrients to your brain, your organs, and your tissues.”

Why does this matter? Because that pressure is what delivers oxygen and nutrients to your brain, your organs, and your tissues. When it’s too high for too long, it puts strain on your blood vessels, your heart, and your entire cardiovascular system.

Optimal blood pressure is around 110/70mmHg. Normal is considered 120/80mmHg. When we start seeing consistent readings above 130/80mmHg, we begin paying closer attention. And consistent readings above 140/90mmHg are where we start to think about hypertension.

Those numbers are important. But what matters just as much is how those numbers are showing up. A single reading, especially in a doctor’s office, doesn’t tell the full story.

Your blood pressure can shift based on what you just did, what you drank, how you slept, whether you’re stressed, how you move, or even how you feel sitting in that chair with a cuff tightening around your arm.

“Your blood pressure can shift based on what you just did, what you drank, how you slept, whether you’re stressed.”

Some people experience what’s called “white coat hypertension,” where their blood pressure is elevated in a clinical setting and normal at home. Others may have the opposite scenario, where it looks fine in the office but trends higher throughout their day or at home. This is why I often recommend looking at patterns instead of snapshots.

When you zoom out and track your blood pressure over time, especially morning and evening readings, you start to understand what your body is doing, not just what it did in one moment.

Your nervous system is driving more than you think

One of the most common patterns I see in practice is this: high blood pressure that is deeply tied to stress.

It’s not just emotional stress, but physiological stress: Caffeine. Poor sleep. Skipping meals. Overtraining. Sitting all day and then trying to “push through” a workout. Constant mental load. Feeling on edge more often than not.

“It’s not just emotional stress, but physiological stress: Caffeine. Poor sleep. Skipping meals. Overtraining.”

The body doesn’t separate these things. It just reads them as demand.

Now, it’s important to say this: Not all increases in blood pressure are bad. Your blood pressure is supposed to rise during exercise. It’s supposed to adapt to movement and effort. That’s part of a healthy, responsive system.

The issue is when the body stays elevated when it doesn’t need to be.

When your nervous system is spending more time in a sympathetic state, that fight-or-flight mode, your body adapts accordingly. Blood vessels constrict. Heart rate increases. Blood pressure rises. This isn’t your body doing something wrong. It’s your body trying to keep up with the lifestyle you’re feeding it.

When that high-demand state becomes chronic, and the body doesn’t get enough signals that it’s safe to come back down, those elevated patterns can start to stick.

This is why blood pressure is so often connected to what I would call an “anxious body.” Not necessarily anxious thoughts, but a body that has been living in a heightened state for too long.

The heart and brain are in constant conversation

This is the part that most people never hear about. Your heart is not just pumping blood. It’s communicating with your brain with every single beat.

“Your heart is not just pumping blood. It’s communicating with your brain with every single beat.”

On average, your heart beats around 100,000 times a day. And each beat sends signals to your brain through pressure receptors in your blood vessels and through pathways like the vagus nerve.

These signals help regulate your heart rate, your blood pressure, your stress response, and even your mood and focus. It’s a dynamic, responsive system.

But when blood pressure stays elevated over time, that communication starts to change. Those pressure sensors become less sensitive. So even though blood pressure is high, the brain doesn’t “hear” it as clearly.

The system becomes more stress-driven. There’s more sympathetic activation, more tension in the blood vessels, and less calming input from the parasympathetic nervous system. This is often reflected in lower heart rate variability, which is one of the ways we measure how adaptable and resilient the body is.

Instead of a flexible, responsive system, things become more rigid. And that shift doesn’t just affect blood pressure. It can influence sleep, mood, and overall regulation.

What raises blood pressure in real life

When people think about high blood pressure, they often think about salt intake or genetics. Caffeine is a big one. For some people, especially if they’re already stressed or under-recovered, it can push blood pressure higher than they realize.

“When blood pressure is creeping up, it’s usually not just the salt shaker — it’s also the ultra-processed foods…that can push numbers higher.”

As Dr. Mark Hyman often emphasizes, when blood pressure is creeping up, it’s usually not just the salt shaker — it’s also the ultra-processed foods: refined flour and sugar, packaged snacks/fast food, sugary drinks, and alcohol that keep the body inflamed and insulin-resistant that can push numbers higher. When we swap those for real, whole foods — especially potassium-rich plants — blood pressure often starts to shift in the right direction.

And those things matter. But in day-to-day life, I also see a different set of drivers show up again and again.

Sedentary lifestyles play a role. The body is designed to move, and circulation depends on it. Long periods of sitting can affect vascular tone and overall cardiovascular health.
Chronic stress is one of the biggest factors. And not just big, obvious stress. The low-grade, constant pressure that many people are living under.
Anxiety plays a role here as well. Even when it’s subtle but ongoing, it can keep the body in a more activated state.
Inflammation is another piece that doesn’t get talked about enough. Chronic stress, excess body weight, and even ongoing pain can all create inflammatory states in the body, which can influence blood pressure over time.
With excess body weight, the heart also has to work harder to circulate blood throughout the body, which can increase pressure within the system.
Hormonal factors can contribute as well. Thyroid function, for example, plays a role in metabolism and cardiovascular regulation, and imbalances can sometimes show up in blood pressure patterns.
Dehydration can also impact blood pressure more than people expect.
And then there’s sleep. Poor sleep, inconsistent sleep, or sleep that doesn’t consistently feel restorative when waking can all affect how the body regulates blood pressure the next day. Your circadian rhythm has a role to play in your blood pressure story, not just your sleep.

None of these exist in isolation. They layer.

And over time, the body starts to reflect that load.

Light, movement, and blood flow

There are also some less obvious ways we can support blood pressure that don’t get talked about as much.

One of them is light.

Sunlight, specifically UVA light, has been shown to trigger the release of nitric oxide from the skin. Nitric oxide helps dilate blood vessels, which can lower blood pressure and improve circulation.

“Sunlight, specifically UVA light, has been shown to trigger the release of nitric oxide from the skin.”

This is one of the reasons why time outside can feel so regulating for the body. It’s not just good for you mentally. There are real physiological shifts happening when we spend time in the sunlight. Infrared light, whether from the sun or from tools like infrared saunas or red light devices, can also support circulation and blood flow in a different way, helping tissues relax and recover.

Movement plays a similar role. It supports vascular health, improves circulation, and helps the body regulate pressure more efficiently.

Another tool that can support blood pressure regulation is contrast therapy — alternating between hot and cold exposure. This creates a natural rhythm of constriction and dilation in your blood vessels, which helps improve vascular flexibility over time. Think of it as a workout for your circulatory system. The more adaptable your blood vessels are, the better your body can regulate pressure.

These are simple things, but they’re powerful because they work with the body’s natural systems.

How to actually track it

If you’re trying to understand your blood pressure, one of the most helpful things you can do is track it at home.

I often recommend taking your blood pressure in the morning and again in the evening, around the same times each day, for about a week. That gives you a much clearer picture of your baseline.

A few small things can make a big difference in getting an accurate reading:

Sit quietly and avoid talking during the measurement
Take slow, relaxed breaths
Uncross your legs
Keep your arm supported and relaxed, not held stiff
Empty your bladder before checking it

These details might seem small, but they can influence the numbers more than you’d expect.

You might be wondering about wearables here. While many devices can track heart rate, sleep, and stress trends, they’re not yet accurate enough to rely on for blood pressure measurements. A validated upper arm cuff is still the most reliable way to get a true reading, and wrist cuffs tend to be less accurate.

“A validated upper arm cuff is still the most reliable way to get a true reading.”

That said, wearables can still be helpful. They give you insight into patterns like heart rate variability, sleep quality, and stress levels, all of which can influence your blood pressure over time.

What your blood pressure reveals about your body’s state

When blood pressure is consistently elevated, the heart has to work harder to move blood through the body. The heart is a highly muscular organ, and over time, that increased workload can lead to changes in its structure and function. But long before we get there, blood pressure is often giving us quieter signals that are easy to overlook:

It might be telling you that your body is under more stress than it can currently regulate — even if you don’t feel “stressed” in the way you expect.
It might be telling you that your nervous system is spending more time in a heightened, activated state and not enough time recovering.
It might be reflecting that your body isn’t getting consistent signals of safety— through rest, through breath, through rhythm in your day.
It might be pointing to patterns in sleep, movement, or daily habits that feel small on their own but are adding up over time.
It might even be telling you that your body is working harder than it should have to, just to maintain balance.

This isn’t cause to panic. It’s a reminder to pay attention to what your body has been trying to communicate, sometimes long before anything feels “wrong.”

“It’s a reminder to pay attention to what your body has been trying to communicate, sometimes long before anything feels ‘wrong.’”

At the same time, it’s important to say this clearly: Consistently elevated blood pressure is not something to ignore. Over time, it can increase the risk of cardiovascular disease, stroke, kidney disease, and changes to the structure of the heart itself.

If your blood pressure is persistently elevated, it’s important to work with your healthcare provider to understand what’s driving it and how to manage it appropriately.

Curiosity, not fear

Blood pressure is one of the most routine measurements in medicine. Most of us have had it checked more times than we can count. And most of the time, we move on from it just as quickly.

“What if it’s one of the most accessible windows we have into how our body is actually doing?”

But what if it’s one of the most accessible windows we have into how our body is actually doing? Not just cardiovascular health, but how we’re responding to stress, how we’re recovering, and how much load we’re carrying day to day. It’s a number most of us have heard dozens of times. And yet, when you start to look at it in context, it becomes something much more useful.

In my practice at Love.Life, this is often where the conversation begins. Not with fear, but with curiosity. It’s not something to ignore and definitely not something to fear.

But it is something absolutely worth paying attention to.

Dr. Jaclyn Tolentino is a Board-Certified Family Physician and the Lead Functional Medicine Physician at Love.Life. Specializing in women’s health and hormone optimization, she has been featured in Vogue, The Wall Street Journal, and Women’s Health. As a functional practitioner and a breast cancer survivor, Dr. Tolentino is dedicated to uncovering the root causes of health challenges, employing a holistic, whole-person approach to empower lasting wellbeing. Follow her on Instagram here for more insights.

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