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Hair Follicle Inflammation (Folliculitis) – Causes & Treatment

Hair follicle inflammation, known medically as folliculitis, is an infection or irritation of the hair follicles. It typically appears as red, itchy pustules on the skin.

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Things worth knowing about "Hair Follicle Inflammation"

Hair follicle inflammation, known medically as folliculitis, is an infection or irritation of the hair follicles. It typically appears as red, itchy pustules on the skin.

What is Hair Follicle Inflammation?

Hair follicle inflammation, medically known as folliculitis, is an inflammatory condition affecting the hair follicles – the small pockets in the skin from which hairs grow. It can occur anywhere on the body where hair grows, but is most commonly found on the face, neck, armpits, chest, back, thighs, and buttocks. The condition ranges from superficial to deep and is generally benign and easily treatable.

Causes

The most common cause of folliculitis is infection with Staphylococcus aureus, a bacterium naturally found on the skin. Other causes include:

Other bacteria (e.g., Pseudomonas aeruginosa, associated with hot tub folliculitis)
Fungal infections (e.g., caused by Malassezia yeasts)
Viral infections (e.g., herpes simplex virus)
Ingrown hairs, often following shaving or waxing
Friction and pressure from tight clothing
Weakened immune system, such as in diabetes mellitus or HIV
Excessive sweating and poor hygiene
Prolonged use of topical corticosteroids

Symptoms

Common signs and symptoms of folliculitis include:

Small red pimples or pustules clustered around hair follicles
Itching and burning sensation at the affected site
Tenderness or mild pain when touched
In deeper forms: larger, painful nodules or abscesses (furuncles)
Crust formation after pustules rupture

In severe or untreated cases, the inflammation can penetrate deeper into the skin, potentially leading to scarring or permanent hair loss.

Diagnosis

Diagnosis is typically made through a clinical skin examination by a healthcare professional. In unclear or severe cases, additional investigations may be required:

Swab and culture: A sample from the affected area is analyzed in a laboratory to identify the causative organism.
Fungal culture or KOH test: If a fungal infection is suspected.
Blood tests: To identify underlying conditions such as diabetes.
Skin biopsy: In rare cases of chronic or unclear folliculitis.

Treatment

Mild Cases

Superficial folliculitis often resolves on its own. The following measures can support recovery:

Warm, moist compresses to relieve discomfort and encourage drainage
Antiseptic wash lotions (e.g., containing chlorhexidine)
Avoiding shaving or hair removal in the affected area

Medication-Based Treatment

Antibiotic creams or gels (e.g., fusidic acid, mupirocin) for bacterial folliculitis
Oral antibiotics (e.g., flucloxacillin, doxycycline) for severe or recurrent cases
Antifungal creams or tablets for fungal infections
Antiviral medications for viral causes (e.g., aciclovir)

Chronic or Recurrent Folliculitis

For frequently recurring folliculitis, long-term antibiotic therapy or laser hair removal may be considered. Underlying conditions such as diabetes should be managed optimally.

Prevention

Regular and thorough skin care and hygiene
Use of sharp, clean razor blades
Shaving in the direction of hair growth
Avoiding tight, chafing clothing
Not sharing towels or razors with others
Regular cleaning and maintenance of hot tubs and swimming pools

References

German Dermatological Society (DDG): Guideline on Bacterial Skin Infections, 2022.
Winters RD, Mitchell M. Folliculitis. In: StatPearls. Treasure Island (FL): StatPearls Publishing; 2023. Available on PubMed NCBI.
Griffiths C, Barker J, Bleiker T, Chalmers R, Creamer D (eds.). Rook's Textbook of Dermatology. 9th edition. Wiley-Blackwell, 2016.

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