Which bacterium is most often responsible?

Most often, Staphylococcus aureus.

Why does it only affect men?

Because it involves only the hair-bearing skin of the beard.

What do the lesions look like?

They are follicular papules and pustules, sometimes crusted, on red, inflamed skin.

It can be painful or cause a burning sensation and discomfort.

It is only slightly contagious, except through direct contact with lesions containing pus.

Does shaving encourage sycosis?

Yes, harsh shaving is a common trigger and aggravating factor.

How does it differ from simple folliculitis of the beard?

Sycosis is deeper, chronic and recurrent.

Can it become chronic?

Yes, without appropriate treatment it often becomes chronic.

Is there a link with nasal carriage of staphylococci?

Yes, nasal carriage encourages recurrences.

Is a bacterial swab useful?

Yes, especially in chronic forms or those resistant to treatment.

Are antibiotics always necessary?

Often, yes, particularly in persistent or severe forms.

How long does treatment last?

Treatment can last several weeks depending on severity.

Should I stop shaving?

Yes, temporarily, to allow the skin to heal.

Can sycosis cause loss of beard hair?

Yes, temporary local hair loss is possible.

Is the hair loss permanent?

Generally not; the hair grows back once the infection has healed.

Can it be mistaken for a fungal infection of the beard?

Yes, particularly tinea barbae, which is why an accurate diagnosis matters.

Are there complications?

Rarely, but deep abscesses or scarring can occur.

Can recurrences be prevented?

Yes, with careful hygiene, a suitable shaving routine and treatment of bacterial carriage.

When should I see a dermatologist?

If lesions are recurrent, chronic or do not respond to the usual treatments.

Dermatology · Bacterial skin infections

Sycosis barbae

Sycosis barbae is a deep, recurrent folliculitis of the beard and moustache, most often caused by Staphylococcus aureus. Encouraged by shaving and nasal carriage of the bacterium, it appears as papules and pustules centred on the hairs, sometimes grouped into inflamed patches. Appropriate treatment, combined with management of nasal carriage, limits recurrences and the risk of scarring.

Written by Dr A. Turcarelli, dermatologist and allergist Updated 4 January 2026 6 min read

Book an appointment Frequently asked questions

Introduction

Sycosis barbae is a chronic bacterial infection of the hair follicles in the beard area, affecting only men. It is most often caused by Staphylococcus aureus and leads to recurrent inflammatory lesions, sometimes with pus, causing considerable discomfort and cosmetic concern. Appropriate treatment is needed to prevent it from becoming chronic.

Symptoms

Follicular papules and pustules in the beard area
Persistent inflammatory redness
Local pain or burning sensation
Possible yellowish crusts
Variable itching
Temporary local loss of beard hair
Chronic course with recurrent flare-ups
No general symptoms in most cases

Causes

Bacterial infection with Staphylococcus aureus
Contributing factors: Repeated or harsh shaving Small skin injuries Nasal carriage of staphylococci Moist skin
Repeated or harsh shaving
Small skin injuries
Nasal carriage of staphylococci
Moist skin
Predisposing conditions: Diabetes Weakened immune system
Diabetes
Weakened immune system

Diagnosis

Diagnosis is essentially clinical
Bacterial swab recommended to identify the organism
Testing for nasal carriage in case of recurrences
Differential diagnosis with: Simple folliculitis Fungal infection of the beard (tinea barbae) Acne
Simple folliculitis
Fungal infection of the beard (tinea barbae)
Acne

Treatments

Skin antiseptics
Appropriate topical antibiotics
Prolonged oral antibiotics for chronic forms
Treatment of nasal carriage if necessary
Temporarily stopping shaving
Using gentle, non-traumatic shaving techniques
Careful hygiene of the area
No instrument-based dermatological technology
Specialist, long-term medical care

Management

Specialist dermatological care

Regular follow-up to prevent recurrences

Treatment adjusted according to progress

Personalised advice on hygiene and shaving

Frequently asked questions

Consultation for sycosis barbae

Consultation with a confirmed diagnosis and a written treatment plan.

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