Vasomotor disorders are conditions that affect how blood vessels open and close, leading to unusual changes in skin colour, temperature, and sensation. Three of the most common vasomotor disorders are livedo reticularis, acrocyanosis, and erythromelalgia. While these conditions may sound alarming, many cases are benign and manageable. This article explains what each condition is, what symptoms to watch for, and when to speak with your family doctor or visit a walk-in clinic.
What Are Vasomotor Disorders?
Your blood vessels constantly adjust their size to control blood flow throughout your body. When this process malfunctions, it can cause poor circulation in the skin and limbs. These disruptions are called vasomotor disorders.
Some vasomotor disorders are harmless and mainly cosmetic. Others may signal an underlying health condition that needs medical attention. Understanding the differences can help you know when to act.
According to Mayo Clinic, circulation problems involving the small blood vessels can affect people of all ages, though certain conditions are more common in younger adults and women.
Livedo Reticularis: The Mottled Skin Pattern
Livedo reticularis is a vasospastic condition, meaning the blood vessels go into spasm and restrict blood flow. Its cause is often unknown. It produces a distinctive mottled, net-like pattern on the skin that looks like a fishnet or lacework.
The affected skin appears bluish-purple in a web-like pattern surrounding pale central areas. This discolouration typically covers large areas of the thighs, forearms, and sometimes the lower abdomen.
Who Gets Livedo Reticularis?
Livedo reticularis is most common in young women, but it can affect anyone. In many cases, it appears on its own with no other health problems. However, it can sometimes be linked to other conditions, including:
Hidden (occult) malignancies
Polyarteritis nodosa, a type of blood vessel inflammation
Atherosclerotic microemboli, which are tiny blood clots affecting the skin
Autoimmune diseases
Symptoms of Livedo Reticularis
Beyond the visible skin changes, livedo reticularis can also cause:
Tingling or numbness (called paraesthesia) in the affected area
A feeling of coldness in the skin
Reduced muscle tone in affected limbs
Cold, sweaty hands or feet
In severe cases, recurring ulcers may develop on the lower legs. If livedo reticularis is linked to an autoimmune disease, ulcers or even gangrene can occur. In these situations, treating the underlying condition is essential.
How Cold Weather Affects Livedo Reticularis
The mottled skin pattern becomes much more noticeable in cold weather. In warm weather, the discolouration may fade to a reddish tint, but it rarely disappears completely. The pulse in the peripheral arteries remains normal in most cases.
The main recommendation for managing livedo reticularis is to avoid cold exposure as much as possible. Vasodilator medications — drugs that widen blood vessels — are sometimes prescribed but are not used routinely. In most cases, livedo reticularis is a benign condition that does not require treatment.
Acrocyanosis: Blue Hands and Feet
Acrocyanosis is a rare vasomotor disorder that causes persistent bluish discolouration of the hands and feet. It can also affect the forearms and lower legs to a lesser degree. The word itself means “blue extremities” in Greek.
The condition happens when the small arteries in the skin contract (vasospasm), while the tiny veins just below the skin surface dilate. This causes poorly oxygenated blood to pool and flow slowly through the skin, giving it a blue or purple colour.
Who Is Affected by Acrocyanosis?
Acrocyanosis affects both males and females equally. However, it is most common in teenagers and young adults around age 20. Interestingly, symptoms often improve with age or during pregnancy.
Like livedo reticularis, acrocyanosis worsens in cold weather but does not fully disappear in warm seasons. This is an important clue that helps doctors distinguish it from other conditions.
Symptoms of Acrocyanosis
People with acrocyanosis typically notice the following:
Cold hands and feet
Sweating of the affected areas
Mild swelling (oedema)
Bluish or purplish skin colour on the hands and feet
Importantly, acrocyanosis does not cause pain. There are no tissue damage or disability-causing lesions, and the pulse in the peripheral arteries remains intact. These features help set it apart from more serious circulatory problems.
Managing Acrocyanosis in Canada’s Climate
Given how cold Canadian winters can be, managing acrocyanosis requires practical lifestyle adjustments. Wearing warm, layered clothing — especially gloves and wool socks — is the most effective way to reduce symptoms. Most people with acrocyanosis do not need medication.
For more information on circulatory health, Healthline’s guide to acrocyanosis provides a helpful overview of the condition and its management.
Erythromelalgia: Burning Pain in the Extremities
Erythromelalgia is a vasomotor disorder that works in the opposite way to acrocyanosis. Instead of too little blood flow, it involves sudden episodes of excessive blood vessel dilation (widening). This causes intense burning pain, redness, and warmth in the hands and feet.
Erythromelalgia can be primary (idiopathic), meaning it occurs for no known reason in otherwise healthy people. It can also be secondary, meaning it develops as a result of another condition.
What Causes Secondary Erythromelalgia?
Secondary erythromelalgia is associated with several underlying conditions, including:
Polycythaemia vera, a bone marrow disorder that causes too many red blood cells
High blood pressure (hypertension)
Gout
Neurological diseases
Primary erythromelalgia is rare in children but can affect people of any age. It affects males and females equally.
Symptoms of Erythromelalgia
Erythromelalgia causes episodes — sometimes called flares or attacks — of bilateral (both-sided) burning pain. These episodes can last from a few minutes to several hours. Early on, flares affect limited areas of the palms and soles. As the condition progresses, they may involve the entire hand or foot.
Flares are most common at night, when the limbs warm up under bed covers. They can also be triggered by:
Rising room temperature
Physical exercise
Prolonged physical exertion
During a flare, the skin may appear red (erythema) or bluish (cyanosis), and local temperature rises noticeably. Between episodes, the skin looks completely normal on examination.
How to Relieve an Erythromelalgia Flare
Elevating the affected limb and cooling the area can provide relief during a flare. Avoiding warm environments is also strongly recommended. For primary erythromelalgia, aspirin (650 mg every 4 to 6 hours) may help reduce the intensity of symptoms — but always check with your doctor before starting any medication regimen.
In severe cases where medication does not help, surgical cutting of peripheral nerves may be considered to relieve pain. However, this is rare. Primary idiopathic erythromelalgia is always considered a benign condition.
For a broader overview of vasomotor and circulation-related disorders, Health Canada offers reliable health information for Canadians navigating their care options.
Comparing the Three Vasomotor Disorders
It helps to understand how these three vasomotor disorders differ from one another. While they all involve abnormal blood vessel behaviour, they have very different appearances and symptoms.
Livedo reticularis — Bluish, net-like mottled skin pattern; worsens in cold; often benign
Acrocyanosis — Persistent blue-purple discolouration of hands and feet; no pain; worsens in cold
Erythromelalgia — Episodes of burning pain, redness, and warmth; triggered by heat and exercise
Therefore, while cold weather worsens livedo reticularis and acrocyanosis, it actually relieves erythromelalgia symptoms. This contrast is a key diagnostic clue for healthcare providers.
When to See a Doctor
Many vasomotor disorders are harmless, but some can be a sign of a more serious underlying condition. You should speak with your family doctor or visit a walk-in clinic if you notice:
Persistent or worsening skin discolouration that does not improve with warmth
Skin ulcers or open sores on the legs, hands, or feet
Severe burning pain in your hands or feet that disrupts sleep or daily life
Any sudden changes in skin colour accompanied by other new symptoms
A known autoimmune disease combined with new skin changes
Your family doctor can refer you to a specialist — such as a dermatologist, rheumatologist, or vascular medicine specialist — if needed. Most provincial health plans in Canada cover these referrals. If you do not have a family doctor, a walk-in clinic can assess your symptoms and help determine next steps.
As always, this article is for informational purposes only. Please speak with a qualified healthcare provider before making any decisions about your health or treatment.
Frequently Asked Questions About Vasomotor Disorders
What are vasomotor disorders?
Vasomotor disorders are conditions where blood vessels fail to open and close properly, disrupting blood flow to the skin and limbs. Common examples include livedo reticularis, acrocyanosis, and erythromelalgia. These vasomotor disorders can cause changes in skin colour, temperature, and sensation.
Is livedo reticularis a serious condition?
In most cases, livedo reticularis is a benign vasomotor disorder that does not require treatment. However, it can sometimes be linked to autoimmune diseases or other underlying health problems. If you develop skin ulcers or other new symptoms alongside livedo reticularis, see your doctor promptly.
What triggers erythromelalgia attacks?
Erythromelalgia flares are commonly triggered by warmth, physical exercise, or rising ambient temperature. Many people experience attacks at night when their feet warm up under blankets. Cooling the affected limb and elevating it can help relieve symptoms during an episode.
Can acrocyanosis go away on its own?
Yes, acrocyanosis often improves naturally with age or during pregnancy. It is a mild vasomotor disorder that typically does not cause pain or permanent damage. Wearing warm clothing in cold weather — especially important in Canada — is the main way to manage symptoms.
How are vasomotor disorders diagnosed in Canada?
Diagnosis usually begins with a visit to your family doctor or a walk-in clinic, where your doctor will review your symptoms and examine your skin. Blood tests and specialist referrals may follow depending on the suspected vasomotor disorder. Most provincial health plans in Canada cover these assessments.
What is the difference between acrocyanosis and Raynaud’s disease?
Both conditions cause cold, discoloured hands and feet, but they differ in important ways. Raynaud’s disease causes episodes of colour change triggered by cold or stress, while acrocyanosis causes persistent discolouration that is always present. A doctor can help distinguish between these vasomotor-related conditions with a proper examination.
Key Takeaways
Vasomotor disorders involve abnormal blood vessel behaviour that affects skin colour, temperature, and sensation.
Livedo reticularis creates a bluish, net-like mottled skin pattern, is most common in young women, and is usually benign.
Acrocyanosis causes persistent blue-purple hands and feet, is painless, and often improves with age.
Erythromelalgia triggers episodes of burning pain and redness, usually brought on by heat or exercise.
Cold weather worsens livedo reticularis and acrocyanosis; warmth worsens erythromelalgia.
Most cases are benign, but some vasomotor disorders can signal underlying conditions such as autoimmune disease or blood disorders.
Speak with your family doctor or visit a walk-in clinic if your symptoms are severe, worsening, or accompanied by skin ulcers or other new health concerns.
