External Dental Fistula Quiz

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Yoshinori Abe

Yoshinori Abe, MD (Internal medicine)

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Learn more about External dental fistula

Content updated on Nov 2, 2022

What is external dental fistula?

External dental fistula is an abnormal connection between the skin and root of the tooth. The underlying dental problem leads to skin manifestations. It mainly occurs following an abscess which in turn may be caused due to trauma or infection.

Symptoms of external dental fistula

  • Bumps containing pus

  • Skin redness or red bumpy rashes

Questions your doctor may ask to check for external dental fistula

Your doctor may ask these questions to diagnose external dental fistula

  • Do you have bumps on your skin with pus?

  • Do you have red skin or red spots on the skin?

Treatment for external dental fistula

Regular rinsing of mouth with warm water and salt or antisepytic gargles helps in killing the bacteria and maintain good oral hygiene. A consultation with a dentist is required. Oral antibiotics can be beneficial.

View the symptoms of External dental fistula

  • Pustule

  • Red skin


  • Mizuno M, Hoashi T, Hisano A, Ichiyama S, Funasaka Y, Saeki H. A Case of External Dental Fistula Related to a Fixed Cantilever Bridge. J Nippon Med Sch. 2017;84(4):198-200. doi: 10.1272/jnms.84.198. PMID: 28978902.


  • Watanabe S, Tanaka M, Dekio I, Ishizaki S, Sawada M. Dermoscopic features of a case of external dental fistula. Australas J Dermatol. 2018 May;59(2):e146-e148. doi: 10.1111/ajd.12613. Epub 2017 Sep 29. PMID: 28960242.


Reviewed By:

Yoshinori Abe

Yoshinori Abe, MD (Internal medicine)

From our team of 50+ doctors

Just 3 minutes.
Developed by doctors.

Ubie is supervised by 50+ medical experts worldwide

Shohei Harase

Shohei Harase, MD


Kameda Medical Center, Japan

Yu Shirai

Yu Shirai, MD


Yotsuya Yui Clinic, Japan

Yoshinori Abe

Yoshinori Abe, MD

Internal medicine

Co-founder of Ubie, Inc.

Rohini R

Rohini R, MD

Ear, nose, throat (ENT)

Bayshore Health Centre, India

Seiji Kanazawa

Seiji Kanazawa, MD, PHD

Obstetrics and gynecology (OBGYN)

National Center for Child Health and Development, Japan

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