Folliculitis has many causes. It may be infectious or noninfectious.
Infectious folliculitis is caused by:
Non-infectious folliculitis may be caused by:
- Irritation from clothing
- Certain medications
- Chemical exposure
- Sun exposure
- Missing nutrients in your diet
Contact dermatitis, poison ivy, acne, or rosacea may also cause folliculitis.
Factors that may increase your chanced of folliculitis:
- A suppressed immune system
- Exposure to bacterial infection
- Having other skin conditions, especially those that cause a lot of itching
- Shaving against the direction of hair growth
- Use of contaminated hot tubs, poorly maintained swimming pools, or contaminated lakes
- Exposure to oils and chemicals
- Overuse of medications applied to the skin
You will be asked about your symptoms and medical history. A physical exam will be done. Diagnosis may be made by looking at your skin. Testing will help your doctor determine the type and cause of the folliculitis. Other tests may be done to rule out specific skin or health conditions.
Tests may include:
- Culture—a swab of an open area to look for infections
- Smear—a sample an open area is smeared onto a glass slide to be looked at under a microscope
- Analysis of affected hair
- Biopsy of affected skin
- Blood tests
In most cases, folliculitis is treated with medication. The type of medication depends on the cause of the folliculitis. Talk with your doctor about the best treatment option for you.
Infectious folliculitis may be treated with:
- Topical or oral antibiotics for bacterial infections
- Topical or oral antifungal medications for fungal infections
- Oral antiviral medications for viral infections
- Topical or oral antiparasitic medications for parasitic infections
Non-infectious folliculitis may be treated with:
- Topical corticosteroids
- Non-steroidal anti-inflammatory drugs (NSAIDs)
This content is reviewed regularly and is updated when new and relevant evidence is made available. This information is neither intended nor implied to be a substitute for professional medical advice. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with questions regarding a medical condition.
Edits to original content made by Denver Health.
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American Academy of Dermatology https://www.aad.org
Centers for Disease Control and Prevention https://www.cdc.gov
Canadian Dermatology Association https://dermatology.ca
Public Health Agency of Canada http://www.phac-aspc.gc.ca
Folliculitis. American Osteopathic College of Dermatology website. Available at: http://www.aocd.org/?page=Folliculitis. Accessed September 27, 2017.
Folliculitis. EBSCO DynaMed Plus website. Available at: http://www.dynamed.com/topics/dmp~AN~T115802/Folliculitis . Updated September 17, 2015. Accessed September 30, 2016.
Hot tub rash (Pseudomonas dermatitis/folliculitis). Centers for Disease Control and Prevention website. Available at: https://www.cdc.gov/healthywater/swimming/swimmers/rwi/rashes.html. Updated May 4, 2016. Accessed September 27, 2017.
Luelmo-Aguilar J, Satandreu MS. Folliculitis: recognition and management. Am J Clin Dermatol. 2004;5(5):301-310.