High blood pressure can cause a range of skin problems, from subtle changes in how blood flows through the skin’s tiniest vessels to painful leg ulcers that resist healing. The connection runs deeper than most people realize: hypertension physically remodels the network of capillaries that feeds your skin, and the chronic inflammation behind elevated blood pressure overlaps with the inflammation driving several common skin diseases. On top of that, the medications used to treat high blood pressure carry their own set of skin-related side effects, making the relationship between blood pressure and skin health surprisingly tangled.
How Hypertension Reshapes the Skin’s Blood Supply
Your skin is packed with tiny blood vessels, capillaries and arterioles so small that red blood cells travel through them in single file. In people with high blood pressure, many of these vessels disappear. Researchers call this “rarefaction,” and both animal and human studies confirm that people with primary hypertension have fewer capillaries and arterioles in their skin than people with normal blood pressure.1PubMed Central. Skin microcirculation and hypertension: is there a connection? This is not just a matter of vessels temporarily shutting down. Research using venous occlusion tests to force-open dormant capillaries found that much of the reduction in capillary density in hypertensive people is structural, meaning the vessels are anatomically absent rather than just temporarily closed.2American Heart Association (Hypertension). Structural skin capillary rarefaction in essential hypertension
Imaging studies support the same picture from a different angle. When researchers used optical coherence tomography angiography to compare the skin of people with high versus normal systolic blood pressure, the high-blood-pressure group had lower dermal vasculature density. The working explanation is that prolonged hypertension stiffens vessels, constricts them, and triggers the death of endothelial cells that line vessel walls.3Scientific Reports. Assessing the impact of aging and blood pressure on dermal microvasculature by reactive hyperemia optical coherence tomography angiography The practical result is skin that gets less oxygen and fewer nutrients, which sets the stage for many of the visible problems that follow.
Martorell Ulcers and Ischemic Skin Damage
The most dramatic skin problem directly caused by high blood pressure is the Martorell ulcer, a painful wound that appears on the lower legs of people with poorly controlled hypertension. These ulcers typically start as a small area of intense, excruciating pain on the outer part of the lower leg, followed by skin breakdown and ulceration.4PubMed Central. Painful Leg Ulceration in a Poorly Controlled Hypertensive Patient: A Case Report of Martorell Ulcer They are often misdiagnosed as venous ulcers or infections because they look similar on the surface, but their underlying cause is entirely different.
What drives a Martorell ulcer is arteriolosclerosis, the thickening and narrowing of the tiny arterioles deep in the subcutaneous tissue. Microscopic examination of these lesions reveals that the arteriole walls have become grotesquely thick relative to their lumen, sometimes with calcium deposits in the vessel walls. In one study of 31 patients, about seven in ten showed this calcification pattern in the subcutaneous arterioles.5JAMA Dermatology. Martorell Hypertensive Ischemic Leg Ulcer: A Model of Ischemic Subcutaneous Arteriolosclerosis Essentially, chronically elevated blood pressure slowly chokes off the blood supply to the skin from below, and at some point the tissue dies. These ulcers are notoriously slow to heal and managing the blood pressure is central to treatment.
The Psoriasis Connection
Psoriasis and hypertension show up together far more often than coincidence would predict, and the relationship appears to run in both directions. In one study, more than half of psoriasis patients had high blood pressure, and the severity of the psoriasis correlated with the likelihood of hypertension.6PubMed Central. Psoriasis and high blood pressure Psoriasis is now increasingly recognized not just as a skin disease but as a systemic inflammatory condition, and recent reviews have flagged a particular risk of difficult-to-control hypertension in people with severe psoriasis.7Clinical and Experimental Dermatology. The association of psoriasis and hypertension: focusing on anti‐inflammatory therapies and immunological mechanisms
The mechanistic link centers on immune-system molecules that are overactive in psoriasis, particularly interleukin-17 (IL-17). In animal experiments, forcing keratinocytes (the most common skin cells) to overproduce IL-17 created severe psoriasis-like skin inflammation and simultaneously drove up systolic blood pressure, caused endothelial dysfunction, and led to left ventricular thickening. The mice in these experiments had reduced survival, and the damage was driven largely by inflammatory immune cells flooding the bloodstream.8PubMed. Interleukin 17 drives vascular inflammation, endothelial dysfunction, and arterial hypertension in psoriasis-like skin disease The implication is striking: the same inflammatory cascade producing red, scaly plaques on the skin is simultaneously stiffening arteries and raising blood pressure. This means that for some people, aggressive treatment of psoriasis might also help their blood pressure, though clinical trials are still working that out.
Rosacea and Elevated Blood Pressure
Rosacea, the chronic flushing and redness that affects the central face, also appears to be connected to cardiovascular health. A systematic review and meta-analysis found that people with rosacea had higher systolic and diastolic blood pressure readings and a higher incidence of hypertension compared to controls.9PubMed Central. Cardiovascular Risk and Comorbidities in Patients with Rosacea: A Systematic Review and Meta-analysis A separate meta-analysis confirmed the correlation with hypertension and dyslipidemia, although rosacea did not appear to correlate with ischemic heart disease or stroke in that analysis.10PubMed. Association between rosacea and cardiometabolic disease: A systematic review and meta-analysis
The direction of causality is less clear than it is with psoriasis. Rosacea involves chronic vascular instability in the facial skin, and it is plausible that whatever is going wrong with blood vessel regulation in the face reflects a broader vascular problem. For now, the practical takeaway is that if you have rosacea, it is worth having your blood pressure and lipids checked, since these conditions tend to travel together.
When Blood Pressure Medications Cause Skin Problems
Sometimes the skin issue is not from the hypertension itself but from the drugs used to treat it. Several major classes of blood pressure medication have well-documented dermatologic side effects, and this is a common source of confusion for patients who develop new skin symptoms after starting treatment.
ACE Inhibitors
ACE inhibitors (drugs ending in “-pril,” like lisinopril and enalapril) are among the most commonly prescribed blood pressure medications, and they can trigger a range of skin reactions. The most dangerous is angioedema, a potentially life-threatening swelling of the lips, tongue, or throat. Other reported reactions include itching, blistering eruptions, hives, sun sensitivity, and hair loss.11PubMed. Angiotensin-converting enzyme inhibitors as inducers of adverse cutaneous reactions ACE inhibitors have also been linked to triggering or worsening psoriasis and pemphigus, a blistering autoimmune skin disease, likely through their effects on vasoactive mediators and angiotensin receptor signaling.12PubMed. Angiotensin converting enzyme and angiotensin converting enzyme inhibitors in dermatology: a narrative review
Beta-Blockers
Beta-blockers (like metoprolol, atenolol, and propranolol) can worsen pre-existing psoriasis and, more rarely, trigger brand-new psoriasis in people who have never had the disease.13PubMed Central. Mechanisms of Beta-Blocker Induced Psoriasis, and Psoriasis De Novo at the Cellular Level Case reports describe patients developing severe, full-body erythrodermic psoriasis after starting a beta-blocker, with no prior history of the skin condition.14PubMed Central. Beta-Blocker-Induced Erythrodermic Psoriasis: A Case Report If you notice new scaly patches or a flare-up of existing psoriasis after starting a beta-blocker, your dermatologist and cardiologist need to talk.
Calcium Channel Blockers and Thiazide Diuretics
Calcium channel blockers (like amlodipine and nifedipine) are well known for causing peripheral edema, the puffy swelling around the ankles and lower legs. This happens because these drugs dilate arterioles more than they relax veins, creating a pressure mismatch that pushes fluid out of capillaries and into surrounding tissue. The swelling is more common in women and tends to worsen with age, upright posture, and higher doses.15PubMed Central. Calcium channel blocker-related peripheral edema: can it be resolved? Thiazide diuretics (like hydrochlorothiazide), meanwhile, can cause photosensitivity, making the skin more vulnerable to sunburn and rash. The typical presentation is eczema-like patches in sun-exposed areas, and hydrochlorothiazide is the most common offender among this drug class.16PubMed. Photosensitivity due to thiazides
Impaired Wound Healing
If you have high blood pressure and are recovering from surgery or a significant wound, healing will likely take longer. The reduced blood supply to skin tissue from microvascular rarefaction and increased vascular resistance both contribute. Research measuring skin perfusion pressure in people with peripheral vascular disease has found that hypertension (along with diabetes and older age) reduces the likelihood of wounds healing properly.17Surgery. Measurement of skin perfusion pressure and skin vascular resistance in the ischemic lower limb by isotope washout
There is a practical upside here: treating the blood pressure appears to help. A meta-analysis of patients undergoing major non-cardiac surgery found that long-term antihypertensive therapy was associated with meaningfully better wound healing scores one week after surgery and reduced scar formation two months later.18PubMed Central. The impact of long-term antihypertensive treatment on wound healing after major non-cardiac surgery in patients with cardiovascular diseases: A meta-analysis If you are planning surgery and have uncontrolled blood pressure, getting it under control beforehand is not just good for your heart; your surgical wound will likely thank you too.
Cold Hands and Exaggerated Skin Responses
People with hypertension often notice that their hands and feet get colder faster in cool weather. This is not coincidental. Research measuring sympathetic nerve activity directed at skin blood vessels found that cold exposure triggers a much larger constriction response in hypertensive people. In one study, cooling produced roughly three times the increase in skin sympathetic nerve activity in hypertensive subjects compared to people with normal blood pressure, and their skin blood flow dropped about twice as much.19PubMed Central. Neurovascular mechanisms underlying augmented cold-induced reflex cutaneous vasoconstriction in human hypertension The exaggerated response relies not just on the usual adrenaline-like pathways but on additional non-adrenergic nerve chemicals that play a larger role in hypertensive skin.
This matters beyond just feeling cold. Chronic, exaggerated vasoconstriction in the skin can contribute to the loss of capillaries described earlier, and it helps explain why hypertensive skin looks and behaves differently: paler when cold, slower to recover warmth, and less resilient overall.
Your Skin as a Sodium Reservoir
One of the more surprising discoveries in blood pressure research over the past couple of decades is that your skin does not just passively receive blood. It actively stores sodium and participates in blood pressure regulation. When you eat a lot of salt, excess sodium accumulates in the skin’s interstitial tissue, bound up in a mesh of molecules called glycosaminoglycans. Immune cells and lymphatic vessels in the skin then work to manage this stored sodium, and the system acts as a buffer to prevent blood pressure from spiking after every salty meal.20PubMed Central. Skin Sodium and Blood Pressure Regulation
When this system breaks down, the sodium stored in the skin itself becomes part of the problem. Excess sodium passing through and accumulating in the skin damages the vascular endothelium and has been linked to hypertension, cardiovascular dysfunction, and inflammatory disruption.21Hypertension Research. Skin regulation of salt and blood pressure and potential clinical implications The idea that the skin is simply a passive wrapper for the body is increasingly outdated. Your skin is an active player in salt handling, and when blood pressure is chronically elevated, that role gets disrupted in ways that may feed back into both the hypertension and the skin’s own health.
Aldosterone and Changes to Skin Tissue
Aldosterone, a hormone that the adrenal glands produce to regulate salt and water balance, is elevated in many forms of hypertension. It turns out that skin cells have receptors for aldosterone and respond to it directly. Laboratory experiments on human skin fibroblasts showed that aldosterone increases the production of collagen type I in a dose-dependent manner through the mineralocorticoid receptor. Interestingly, aldosterone also ramps up elastin production, but through a separate, receptor-independent pathway.22Journal of Investigative Dermatology. Aldosterone-Induced The Production of New Extracellular Matrix in Human Skin is Executed via Distinct Mechanisms This means that chronically elevated aldosterone, as seen in primary aldosteronism or resistant hypertension, may physically alter the skin’s structural proteins over time. Whether this contributes to visible changes like altered skin texture or stretch marks in these patients is an area still under investigation, but the molecular machinery is clearly there.
Preeclampsia and Lasting Skin Microvascular Changes
Preeclampsia, the dangerous rise in blood pressure that can occur during pregnancy, leaves lasting marks on the skin’s blood vessels even after delivery. Women who have had preeclampsia show impaired microvascular reactivity in their skin when tested with standard heating and blood-flow challenges. Specifically, the endothelium-dependent dilation (the part of the blood vessel response that depends on nitric oxide from the vessel lining) is blunted compared to women who had normal pregnancies.23PubMed Central. Women with a history of preeclampsia have preserved sensory nerve-mediated dilation in the cutaneous microvasculature During active preeclampsia, the impairment is even more pronounced: resting skin blood flow patterns are altered, and the normal constriction response to stimuli like holding your breath is weakened.24PubMed. Impaired neurovascular reactivity in the microvasculature of pregnant women with preeclampsia
These findings are important for two reasons. First, they suggest that the skin microcirculation can serve as a window into vascular health after preeclampsia, potentially helping identify women at higher long-term cardiovascular risk. Second, they mean that women with a history of preeclampsia may experience subtle skin-related issues (slower healing, altered temperature regulation) tied to persistent microvascular dysfunction, even if their blood pressure returns to normal after delivery.
Skin Signs of Secondary Hypertension
Sometimes the skin problem is not a consequence of high blood pressure but a clue that something else is driving it. In secondary hypertension, where another condition is pushing blood pressure up, the underlying cause often leaves its own fingerprints on the skin. Cushing’s syndrome, caused by excess cortisol (often from an adrenal tumor), is a classic example. Patients can develop weight gain, prominent stretch marks (striae), acne, hirsutism, and a characteristic rounding of the face, all alongside resistant hypertension.25BMJ Case Reports. Rare but serious cause for hypokalaemia and hypertension Pheochromocytoma, another adrenal tumor, can cause dramatic flushing episodes alongside blood pressure surges. In these cases, recognizing the skin changes can be the thing that leads a clinician to check for the underlying cause rather than simply adding another blood pressure pill.
The Skin as a Diagnostic Window
Researchers are increasingly interested in using the skin’s microcirculation as a noninvasive way to assess vascular health in hypertensive patients. Techniques like laser speckle contrast imaging can measure how skin blood vessels respond to challenges (like briefly cutting off circulation with a blood pressure cuff and watching how blood flow rebounds). Studies using this approach have found that people with untreated hypertension and even people with so-called “masked hypertension” (normal readings in the doctor’s office but elevated readings at home) show impaired skin microvascular function compared to people with genuinely normal blood pressure. Hypertensive status turned out to be the single strongest predictor of skin microvascular function in that analysis.26PubMed Central. Skin microvascular function, as assessed with laser speckle contrast imaging, is impaired in untreated essential and masked hypertension More advanced techniques analyzing the rhythmic oscillation of blood flow through the skin also show differences between hypertensive and normotensive people, particularly in how nerve-controlled and nitric-oxide-dependent pathways regulate flow.27PubMed Central. Altered skin flowmotion in hypertensive humans None of this is ready for routine clinical use yet, but the idea that a quick, painless scan of your forearm skin could one day help diagnose or monitor hypertension is not far-fetched. The skin’s blood vessels are, in a very real sense, a miniature version of what is happening throughout your body.