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Spider angioma

Show Alternative Names
Nevus araneus
Spider telangiectasia
Vascular spider
Spider nevus
Arterial spiders

Spider angioma is an abnormal collection of blood vessels near the surface of the skin.

Causes

Spider angiomas are very common. They often occur in pregnant women and in people with liver disease. They can appear in both children and adults. They get their name because the mark looks similar to a red spider.

They appear most often on the face, neck, upper part of the trunk, arms, and fingers.

Symptoms

The main symptom is a blood vessel spot that:

  • May have a red dot in the center
  • Has reddish extensions that reach out from the center
  • Disappears when pressed on and comes back when pressure is released

In rare cases, bleeding occurs in a spider angioma.

Exams and Tests

The health care provider will examine the spider angioma on your skin. You may be asked if you have any other symptoms.

Most of the time, you do not need tests to diagnose the condition. But sometimes, a skin biopsy is needed to confirm the diagnosis. Blood tests may be done if a liver problem is suspected.

Treatment

Spider angiomas usually do not need treatment, but burning (electrocautery) or laser treatment is sometimes done.

Outlook (Prognosis)

Spider angiomas in children may disappear after puberty, and often disappear after a woman gives birth. Untreated, spider angiomas tend to last in adults.

Treatment is often successful.

When to Contact a Medical Professional

Let your provider know if you have a new spider angioma so that other related medical conditions can be ruled out.

Review Date: 11/18/2022

Reviewed By

Elika Hoss, MD, Assistant Professor of Dermatology, Mayo Clinic, Scottsdale, AZ. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.

References

Dinulos JGH. Vascular tumors and malformations. In: Dinulos JGH, ed. Habif's Clinical Dermatology. 7th ed. Philadelphia, PA: Elsevier; 2021:chap 23.

Martin KL. Vascular disorders. In: Kliegman RM, St. Geme JW, Blum NJ, Shah SS. Tasker RC, Wilson KM, eds. Nelson Textbook of Pediatrics. 21st ed. Philadelphia, PA: Elsevier; 2020:chap 669.

Disclaimer

The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. No warranty of any kind, either expressed or implied, is made as to the accuracy, reliability, timeliness, or correctness of any translations made by a third-party service of the information provided herein into any other language. © 1997- A.D.A.M., a business unit of Ebix, Inc. Any duplication or distribution of the information contained herein is strictly prohibited.

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