Understanding Spider Angioma: Causes, Symptoms, and Management
Updated: 2 days ago
Medically reviewed by Dr. Baraa Alnahhal, MD · Last reviewed: October 2026
Quick Answer: What is a spider angioma?
A spider angioma, also called a spider nevus, is a small red or purple skin mark caused by widened blood vessels near the surface, with a central dot and thin lines extending outward like spider legs. [1] It is common in healthy children, pregnant women and people with liver conditions. [1] Treatment is often unnecessary, though laser removal is an option.
What the research says
Spider angiomas are a well-known sign of chronic liver disease, but good studies are scarce. A case report notes that spider angiomas are a well-known physical exam feature in chronic liver disease and that few studies have looked at their number and location as prognostic indicators, so more research is needed. The patient described had three spider angiomas and decompensated liver disease (Terp and Izquierdo-Pretel, Cureus, 2023) [2].
Sources differ on how many marks are “too many.” A case report and literature review of extensive spider angiomas in a man with chronic alcohol use and Zieve’s syndrome states that more than six spider nevi are considered abnormal. [3] Some patient resources use a lower cut-off of more than three, which is why checking with a healthcare provider when several marks appear is a sensible approach (Sivanandam et al., J Family Med Prim Care, 2022).
What is a Spider Angioma?
A spider angioma is a collection of small, dilated blood vessels located just beneath the skin’s surface. [1] These marks, also known as spider nevi or spider telangiectasia, are characterized by their unique appearance: a central red or purple dot representing a dilated arteriole, with thin, radiating lines that resemble the legs of a spider. These capillaries are typically less than half a centimeter in diameter and are most frequently found on the face, neck, upper torso, and arms.
Most spider angiomas are benign and do not pose a direct threat to physical health. [1] They are particularly common among healthy children and young adults, often disappearing naturally as the individual ages. Furthermore, they are frequently observed during pregnancy due to hormonal shifts, typically resolving within a few months after childbirth. [1]
What are the symptoms of spider angioma and how is it identified?
The primary symptom of a spider angioma is its distinct visual presentation. The mark is usually flat or slightly raised and will temporarily disappear, or “blanch,” when pressure is applied to the center. Once the pressure is released, the blood flow returns, and the mark becomes visible again. [1] While they do not cause pain, they may bleed slightly if the skin is injured in that specific area. [1]
Feature | Description |
Color | Red to purple |
Shape | Central dot with radiating “leg-like” lines |
Size | Less than 1/4 inch (0.5 cm) |
Blanching | Disappears when pressed; reappears when released |
Texture | Flat or slightly raised, similar to a small pimple |
What causes spider angioma and who is at risk?
The exact reason why blood vessels dilate to form these marks is not fully understood. [1] However, medical research suggests a strong link between spider angiomas and elevated levels of estrogen in the body. This explains their high prevalence during puberty and pregnancy, as well as in individuals taking oral contraceptives.
In some cases, the development of multiple spider angiomas, typically defined as more than three, can be an indicator of an underlying systemic condition. [1] These marks are often associated with liver dysfunction, such as cirrhosis or hepatitis, as the liver plays a crucial role in processing hormones like estrogen. For more on these conditions, see our guides to alcoholic hepatitis, liver fibrosis, and hyperthyroidism.
Risk Group | Prevalence or Context |
Pregnant individuals | Nearly 60% develop at least one mark |
Healthy children | Nearly 38% may have at least one mark |
Liver conditions | Common in cirrhosis and alcoholic hepatitis |
Hormonal factors | Linked to high estrogen or oral contraceptive use |
Other conditions | Associated with rheumatoid arthritis and thyrotoxicosis |
How is spider angioma diagnosed and managed?
Healthcare providers typically diagnose spider angiomas through a simple visual examination due to their unique color and shape. [1] If an individual presents with multiple angiomas, further testing, such as blood work to evaluate liver and thyroid function, may be recommended to rule out underlying systemic issues. [1]
Treatment for spider angiomas is generally not required for medical reasons, as many marks fade over time. However, for those who find the marks cosmetically bothersome, removal procedures are available. [1] These include laser therapy, which uses targeted light beams to close the problematic vessels, and electrodesiccation, which involves using a specialized electric needle to seal the vessels.
What is the long-term outlook for spider angioma, and can it be prevented?
The long-term outlook for individuals with spider angiomas is excellent. Most cases are purely cosmetic and resolve spontaneously, particularly those related to pregnancy or childhood development. While removal procedures are effective, there is a possibility that the marks may return in the future.
Because the underlying cause of vessel dilation is often unknown, there are no specific steps to prevent spider angiomas. However, maintaining overall health, particularly liver and thyroid function, may reduce the risk of developing multiple marks associated with systemic conditions.
Conclusion
Spider angiomas are common skin occurrences that, in most cases, are harmless and temporary. While their appearance may be startling, they are rarely a cause for medical concern unless they appear in large numbers. Understanding the link between these marks and hormonal or liver health can help individuals determine when a consultation with a healthcare provider is appropriate.
Next Steps
If you notice more than three spider angiomas appearing on your skin, or if you have concerns about their appearance, consult a healthcare professional. [1] A thorough evaluation can help determine if the marks are benign or if they indicate an underlying health condition that requires attention.
Trusted resource: Cleveland Clinic: Spider Angioma (Spider Nevus).
Frequently Asked Questions
Are spider angiomas cancerous?
No, spider angiomas are benign, noncancerous marks caused by dilated blood vessels and do not pose a threat of becoming malignant.
Do spider angiomas hurt?
Spider angiomas are generally painless and do not cause itching or discomfort.
Can spider angiomas bleed?
While they do not bleed spontaneously, they may bleed lightly if the skin is scratched or otherwise injured.
Why do they disappear when I press on them?
Disappearing when pressed is called blanching. Pressing on the central arteriole temporarily stops blood flow to the radiating capillaries, causing the mark to fade until the pressure is released.
Will my spider angiomas go away after pregnancy?
Yes, most pregnancy-related spider angiomas disappear within a few months after delivery as hormone levels stabilize.
Are spider angiomas the same as varicose veins?
No, while both involve blood vessels, spider angiomas are small, localized marks involving capillaries, whereas varicose veins are larger, twisted veins usually found in the legs. See our guide to sclerotherapy for varicose and spider veins for a related condition.
Can children get spider angiomas?
Yes, they are very common in healthy children and often disappear as the child grows older.
Is laser removal permanent?
Laser therapy is effective at removing existing marks, but there is always a chance that new ones may form or the original one may return.
Can diet prevent spider angiomas?
There is no specific diet to prevent them, but maintaining a healthy liver through balanced nutrition and avoiding excessive alcohol can be beneficial.
How many spider angiomas are considered “normal”?
Having one or two marks is considered normal. If you have more than three, it is advisable to speak with a healthcare provider.
Can men get spider angiomas?
Yes, men can develop them, though they are more common in women due to the influence of estrogen.
Are spider angiomas related to age?
Spider angiomas can appear at any age, but they are particularly common in children, young adults, and during pregnancy.
Does alcoholic hepatitis cause these marks?
Liver conditions like alcoholic hepatitis can be associated with multiple spider angiomas, because the liver plays a key role in processing estrogen.
What is the difference between a spider angioma and a cherry angioma?
Spider angiomas have radiating “legs,” while cherry angiomas are solid, bright red, dome-shaped bumps. Hemangiomas are a different type of vascular growth (see our guide to hemangiomas).
Can I remove a spider angioma at home?
No, you should never attempt to remove skin marks at home. Professional medical procedures are necessary to ensure safety and prevent scarring or infection.
References
Cleveland Clinic. Spider Angioma (Spider Nevus). Cleveland Clinic. June 7, 2022. https://my.clevelandclinic.org/health/diseases/23200-spider-angioma
Terp K, Izquierdo-Pretel G. Spider angioma number and location as potential prognostic indicators in chronic liver disease: a case report. Cureus. 2023;15(1):e34193. PMID 36843700. https://doi.org/10.7759/cureus.34193
Sivanandam LK, Kannan A, Srinivasan AA, et al. A rare case of extensive cutaneous spider angioma in Zieve’s syndrome: a case report and review of literature. J Family Med Prim Care. 2022;11(7):4036-4038. PMID 36387672. https://doi.org/10.4103/jfmpc.jfmpc_2373_21
Medical Disclaimer
This article is for informational purposes only and does not constitute medical advice. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read in this article.
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