Pseudofolliculitis Barbae: Pathogenesis and Treatment

Overview / Definition Pseudofolliculitis barbae (PFB) is an inflammatory skin condition that arises from hair follicle irritation and inflammation, typically following shaving. It is most prevalent in individuals with coarse, curly hair, leading to ingrown hairs that can cause inflammation and secondary infection. While it can occur in any area of the body where hair is shaved, it is most commonly seen in the beard area of men and is particularly problematic for individuals with darker skin types. Epidemiology Pseudofolliculitis barbae predominantly affects individuals of African descent, with studies indicating a prevalence of up to 60% among African American men. It can also be observed in individuals with curly or coarse hair from other ethnic backgrounds. The condition is less common among individuals with straight hair. Prevalence is highest in African American males. Other ethnic groups with curly hair are also affected. Incidence can increase with improper shaving techniques. Pathophysiology / Mechanism The pathogenesis of PFB involves several mechanisms: Hair Structure: Curly hair has a propensity to grow back into the skin due to its shape. Shaving Techniques: Close shaving, particularly with a razor blade, can lead to the hair growing back into the follicle. Inflammatory Response: The body reacts to the ingrown hairs with an inflammatory response, leading to the characteristic papules and pustules. The presence of inflammation can also lead to hyperpigmentation, especially in darker skin types, resulting in post-inflammatory changes that can persist long after the lesions resolve. Clinical Presentation PFB typically presents as: Lesions: Erythematous papules, pustules, and sometimes keloids in the beard area. Symptoms: Itching, burning, and tenderness in the affected area. Distribution: Commonly found on the neck, chin, and cheeks. Lesions may become secondary infected, leading to the formation of abscesses and increased discomfort. Diagnosis / Workup The