Livedo Reticularis - Symptoms, Causes & Treatment
By ScanSkinAI Editorial Team✓ Reviewed for medical safetyLast updated June 2026
A mottled, net-like discoloration of the skin caused by changes in blood flow. It can be benign or indicate an underlying condition.
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Quick Answer
Livedo reticularis is a net-like, reddish-blue mottling of the skin caused by changes in blood flow. Most often, it appears on the legs in response to cold and fades when you warm up, which is completely harmless. However, if the lacy pattern persists when warm, looks irregular, or appears alongside other symptoms like pain or sores, it may indicate an underlying autoimmune, clotting, or vascular condition. You should consult a doctor to rule out any serious blood flow issues and determine if treatment is necessary.
Clinical Context
Livedo reticularis is characterized by a reticular (net-like) pattern of reddish-blue skin discoloration caused by deoxygenated blood in dilated capillaries and venules. Physiologic livedo (cutis marmorata) is a benign response to cold that resolves with warming. Pathologic livedo racemosa has broken, irregular patterns and suggests underlying vascular, autoimmune, or hematologic disease. It can be the first sign of serious conditions like antiphospholipid syndrome or Sneddon syndrome.
Symptoms
- Net-like, mottled pattern on skin
- Purple, blue, or red coloration
- Usually on legs
- Worsens with cold
- May be patchy or widespread
Severity & Progression
Causes & Risk Factors
- Cold exposure (benign)
- Autoimmune conditions (lupus)
- Blood clotting disorders
- Medications
- Infections
Treatment & Management
Treatment depends entirely on the underlying cause. Benign physiologic livedo requires only warming and reassurance. For persistent or pathologic livedo, a thorough workup is needed including autoimmune markers, antiphospholipid antibodies, and assessment for vasculitis. Treatment of underlying conditions (anticoagulation for clotting disorders, immunosuppression for autoimmune causes) often improves the livedo. Smoking cessation and avoiding cold exposure help all forms.
- Keeping warm for benign type
- Treating underlying condition
- Anticoagulants if clotting disorder
- Avoiding cold exposure
Red Flags & Complications
Seek medical attention if you experience any of the following:
- Skin ulceration (with underlying disease)
- Stroke (in Sneddon syndrome)
- Pregnancy complications (antiphospholipid syndrome)
- Progression of underlying autoimmune disease
Self-Care Tips
- Keep extremities warm
- Avoid prolonged cold exposure
- Quit smoking
- Stay physically active to improve circulation
- Report any new symptoms to your doctor
When to See a Doctor
If pattern persists when warm, is painful, or accompanied by other symptoms
Frequently Asked Questions
What does livedo reticularis look like on the skin?
It appears as a web-like or lacy pattern of purplish, blue, or red discoloration, most commonly on the legs. The skin might look mottled or splotchy. In harmless cases, the net-like pattern is usually symmetrical and continuous. If the condition is linked to an underlying disease, the pattern often looks broken, irregular, and remains visible even when the skin is warm.
Why do I get this mottled skin pattern?
The mottled appearance occurs when blood flow changes in the small vessels near the skin's surface. The most common and harmless cause is exposure to cold temperatures. However, it can also be triggered by underlying health issues, including blood clotting disorders, autoimmune conditions like lupus, narrowed arteries, or reactions to certain medications.
How do you treat livedo reticularis?
If the mottling is simply a reaction to the cold, no medical treatment is needed—just keep your skin warm. If it is caused by an underlying medical condition, treatment will focus on that specific issue. Your doctor might prescribe blood thinners for a clotting disorder or medication to manage an autoimmune disease. Quitting smoking and staying active can also help improve healthy blood flow.
Is having net-like skin dangerous?
In most instances, especially if it only happens when you are cold and disappears when you warm up, livedo reticularis is completely harmless. However, persistent skin mottling can sometimes be the first sign of a more serious systemic disease, such as antiphospholipid syndrome or vasculitis. It is not inherently dangerous itself, but the underlying cause might require medical management.
When should I see a doctor about my mottled skin?
You should consult a doctor if the lacy pattern does not go away when you warm up, or if it looks irregular and broken. It is also important to seek medical advice if the skin changes are accompanied by pain, skin ulcers, unexplained fatigue, or if you develop new lumps. A doctor can run tests to check for underlying autoimmune or vascular conditions.
How can I tell if my skin mottling is normal or pathological?
Normal, harmless livedo reticularis typically happens when you are cold, features a smooth and connected net-like pattern, and vanishes completely once you are warm. Pathological livedo often has a jagged, broken pattern, does not fade with warmth, and might appear on the arms or trunk rather than just the legs. Only a healthcare professional can determine the true cause.
Can I prevent my skin from becoming mottled?
For the common, harmless form of this condition, the best prevention is simply keeping your extremities warm and dressing appropriately for cold weather. To support overall circulation and vessel health, it is highly recommended to quit smoking and maintain regular physical activity. If you have an underlying condition causing the mottling, following your prescribed treatment plan may prevent flare-ups.
How can ScanSkinAI help with livedo reticularis?
ScanSkinAI can analyze photos of your skin's net-like pattern to help you track its appearance and identify if it shares visual features with conditions like livedo reticularis. Keep in mind that our technology is only a screening aid and cannot provide a medical diagnosis. You should always consult a healthcare professional to determine if your symptoms require further investigation or treatment.
Medical References
Information on this page is sourced from and verified against reputable medical resources:
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Medical Disclaimer: This information is for educational purposes only and is not intended as medical advice. The content on this page should not be used to diagnose or treat any health problem. Always consult with a qualified healthcare professional for proper medical evaluation, diagnosis, and treatment of your condition.