Epidermoid Cyst Quiz

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Scott Nass

Scott Nass, MD, MPA, FAAFP, AAHIVS (GP / Family doctor)

Yukiko Ueda

Yukiko Ueda, MD (Dermatology)

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Learn more about Epidermoid cyst

Content updated on Sep 20, 2022

What is epidermoid cyst?

Sometimes known as sebaceous cysts. These are harmless bumps under the skin that are more common in men. There are a few causes including skin irritation, injury or surgery.

Symptoms of epidermoid cyst

  • Lumps under the skin

  • Affected area is warm to touch

  • Skin lumps with scabs in the center

  • Breast lump

  • Swelling of the affected area

  • Affected area of skin has stinging or tingling

Questions your doctor may ask to check for epidermoid cyst

Your doctor may ask these questions to diagnose epidermoid cyst

  • Do you feel a lump/lumps under your skin?

  • Is the affected area of your body hot to touch?

  • Do you have a skin lump with a scab or crusting in the center?

  • Do you feel a lump in your breast?

  • Is the affected area swollen?

Treatment for epidermoid cyst

These are harmless and usually do not need treatment. However, a simple surgery can be done for cases that are infected or causing discomfort.

View the symptoms of Epidermoid cyst


  • Maeda T, Mishima K, Imanishi J, Shirahata M, Suzuki T, Adachi JI, Sasaki A, Nishikawa R. An Epidermoid Cyst of the Thoracic Spine in an Elderly Patient. World Neurosurg. 2019 Jul;127:113-116. doi: 10.1016/j.wneu.2019.03.262. Epub 2019 Apr 2. PMID: 30951916.


  • Khalid S, Khan SA, Aurangzeb A, Muhammad G, Khan Afridi EA, Muhammad D. Intradiploic Epidermoid Cyst Of The Skull. J Ayub Med Coll Abbottabad. 2021 Apr-Jun;33(2):349-351. PMID: 34137560.


  • Sîrbu OM, Chirteş AV, Mitricã M, Sîrbu CA. Spinal Intramedullary Epidermoid Cyst: Case Report and Updated Literature Review. World Neurosurg. 2020 Jul;139:39-50. doi: 10.1016/j.wneu.2020.03.207. Epub 2020 Apr 13. PMID: 32298825.


  • Lee S, Jang M, Mann FA, Choi S, Lee JK, Kim JK. Intradiploic epidermoid cyst in a dog. J Am Vet Med Assoc. 2020 Jul 15;257(2):183-188. doi: 10.2460/javma.257.2.183. PMID: 32597736.


  • Cui X, Wu X, Yao X. Surgical treatment for a giant epidermoid cyst on the buttock. Dermatol Ther. 2020 May;33(3):e13275. doi: 10.1111/dth.13275. Epub 2020 Feb 21. PMID: 32061013.


Reviewed By:

Yukiko Ueda

Yukiko Ueda, MD (Dermatology)

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Shohei Harase, MD


Kameda Medical Center, Japan

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Yu Shirai, MD


Yotsuya Yui Clinic, Japan

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Internal medicine

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Rohini R, MD

Ear, nose, throat (ENT)

Bayshore Health Centre, India

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Seiji Kanazawa, MD, PHD

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National Center for Child Health and Development, Japan

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