Folliculitis

Folliculitis is usually a clinical diagnosis after focused history and examination; routine imaging is not indicated for typical limited disease.PubMedPubMedFolliculitis - StatPearls - NCBI Bookshelf Escalate assessment when fever, purulent drainage, deep painful nodules, progressive surrounding erythema, or concern for abscess or cellulitis is present, because bacterial folliculitis can involve deeper follicular structures and may be accompanied by fever.Wiley+1WileyPosition statement: Recommendations on the diagnosis and ...PubMedTaming the Rash: A Dermatological Case Report on Effective Treatments for Refractory Folliculitis

Ask specifically about hot-tub, whirlpool, spa, or contaminated-pool exposure; prolonged antibiotic exposure; shaving or hair-removal procedures; and prior antibacterial treatment failure. Contaminated-water exposure shifts the leading diagnosis toward Pseudomonas folliculitis, whereas persistent or recurrent monomorphic follicular papules and pustules in seborrheic regions that do not respond to antibiotics should shift evaluation toward Malassezia folliculitis.Wiley+3WileyLetter to the Editor - Ng - 2024 - Journal of Paediatrics and ...Wolters KluwerVellus hair follicle diseases : Dermatologica SinicaWolters Kluwer“Hot Tub” Folliculitis from a NonChlorinated... : Pediatric DermatologyPubMedMalassezia Folliculitis: An Underdiagnosed Mimicker of Acneiform Eruptions

Examine the scalp separately from truncal or extremity disease. Alopecic patches with follicular pustules, crusting, pain or burning, and hair tufting are a scarring-alopecia pattern consistent with folliculitis decalvans rather than uncomplicated superficial folliculitis.ScienceDirect+1ScienceDirectFolliculitis Decalvans - an overview | ScienceDirect TopicsPubMedSuccessful treatment of refractory folliculitis decalvans with apremilast - PMC

For suspected Malassezia folliculitis, obtain superficial scraping or follicular contents from an active pustule for direct microscopy with 10%–20% KOH. Clusters of round budding yeast with short hyphae support the diagnosis in an appropriate clinical setting.PubMedPubMedMalassezia Folliculitis: An Underdiagnosed Mimicker of Acneiform Eruptions A positive result must be interpreted with the lesion pattern because Malassezia is normal skin flora and may be present in healthy stratum corneum.PubMedPubMedMalassezia Folliculitis: An Underdiagnosed Mimicker of Acneiform Eruptions

If direct microscopy is unavailable, clinical diagnosis followed by a therapeutic trial is an accepted practical approach for suspected Malassezia folliculitis; bacterial culture is useful when bacterial folliculitis remains a competing diagnosis.PubMedPubMedMalassezia Folliculitis: An Underdiagnosed Mimicker of Acneiform Eruptions In treatment-resistant or diagnostically complex cases, punch biopsy with hematoxylin-eosin and periodic acid–Schiff staining can identify fungal elements and follicular plugging that may be missed by direct examination.PubMedPubMedMalassezia Folliculitis: Pathogenesis and Diagnostic Challenges - PMC

Biopsy is usually unnecessary in routine folliculitis, but it is required to confirm eosinophilic folliculitis.PubMedPubMedFolliculitis - StatPearls - NCBI Bookshelf Expected histology is a perifollicular infiltrate dominated by lymphocytes and eosinophils near the sebaceous gland and follicular duct; bacterial folliculitis instead shows neutrophilic invasion of the follicle.PubMedPubMedFolliculitis - StatPearls - NCBI Bookshelf

For uncomplicated bacterial folliculitis, topical antimicrobials used for impetigo include mupirocin ointment for susceptible Staphylococcus aureus and Streptococcus pyogenes; retapamulin ointment is labeled for impetigo caused by methicillin-susceptible S. aureus or S. pyogenes in patients aged 9 months or older.accessdata fdaaccessdata fda[PDF] 208945Orig1s000 - accessdata.fda.gov Restrict topical antibacterial selection to a compatible superficial bacterial presentation; deep lesions, systemic symptoms, or associated cellulitis require reassessment for a more extensive bacterial skin infection rather than simple topical management.Wiley+1WileyPosition statement: Recommendations on the diagnosis and ...PubMedTaming the Rash: A Dermatological Case Report on Effective Treatments for Refractory Folliculitis

Pseudomonas hot-tub folliculitis follows exposure to contaminated water and commonly presents with discrete pruritic or painful follicular papules and pustules.Wiley+2WileyLetter to the Editor - Ng - 2024 - Journal of Paediatrics and ...Wolters KluwerVellus hair follicle diseases : Dermatologica SinicaWolters Kluwer“Hot Tub” Folliculitis from a NonChlorinated... : Pediatric Dermatology In a typical uncomplicated course, use observation and remove the exposure source because spontaneous clearing usually occurs within 1–2 weeks.Wolters KluwerWolters KluwerVellus hair follicle diseases : Dermatologica Sinica Failure to improve on this trajectory, development of fever, or progressive inflammatory findings should trigger reassessment for an alternative diagnosis or bacterial complication.Wiley+1WileyPosition statement: Recommendations on the diagnosis and ...PubMedTaming the Rash: A Dermatological Case Report on Effective Treatments for Refractory Folliculitis

For Malassezia folliculitis, direct microscopy is preferred when feasible, but clinical treatment can be initiated when microscopy is unavailable and the phenotype is convincing.PubMedPubMedMalassezia Folliculitis: An Underdiagnosed Mimicker of Acneiform Eruptions Evidence summarized in a prospective study reported clearance in 75% of patients receiving systemic ketoconazole alone and improvement in the remaining 25%; this observation supports antifungal-directed rather than repeated antibacterial treatment, but drug selection and safety review should follow current prescribing information.PubMedPubMedMalassezia Folliculitis: An Underdiagnosed Mimicker of Acneiform Eruptions

Folliculitis decalvans presents with painful follicular papules, pustules, crusting, tufted hairs, and alopecic patches, often involving the vertex scalp.ScienceDirect+1ScienceDirectFolliculitis Decalvans - an overview | ScienceDirect TopicsPubMedSuccessful treatment of refractory folliculitis decalvans with apremilast - PMC It is a chronic neutrophilic cicatricial alopecia; the management goal is suppression of inflammation and pustules to limit further permanent hair loss, not expectation of regrowth in scarred follicles.ScienceDirect+1ScienceDirectFolliculitis Decalvans - an overview | ScienceDirect TopicsPubMedSuccessful treatment of refractory folliculitis decalvans with apremilast - PMC

Available treatments include oral and topical antibiotics, topical or intralesional corticosteroids, dapsone, isotretinoin, and combination regimens, but evidence is limited and outcomes vary.ScienceDirect+2ScienceDirectFolliculitis Decalvans - an overview | ScienceDirect TopicsScienceDirectFolliculitis decalvans: Effectiveness of therapies and prognostic factors in a multicenter series of 60 patients with long-term follow-up - ScienceDirectPubMedSuccessful treatment of refractory folliculitis decalvans with apremilast - PMC A systematic review concluded that systemic antibiotic combinations with topical, local, or other systemic agents may provide the best outcome and longest duration of disease control, supporting specialist-led individualized regimens rather than repeated short empiric courses.WileyWileyManagement of Folliculitis Decalvans: A Systematic Review

Isotretinoin has been associated with partial or complete response in 82% of 39 reported patients; doses above 0.4 mg/kg/day for more than 3 months were associated with the best response in that report, although systematic-review findings have been controversial.ScienceDirectScienceDirectFolliculitis decalvans: Effectiveness of therapies and prognostic factors in a multicenter series of 60 patients with long-term follow-up - ScienceDirect Apremilast for refractory folliculitis decalvans is off-label and supported by a case report, not comparative evidence.PubMedPubMedSuccessful treatment of refractory folliculitis decalvans with apremilast - PMC

Eosinophilic pustular folliculitis is a rare noninfectious eosinophilic inflammatory condition; confirmation requires skin biopsy rather than empiric classification as bacterial folliculitis.PubMed+1PubMedFolliculitis - StatPearls - NCBI BookshelfWileyClinical Features and Treatment of Eosinophilic Pustular Folliculitis ... Histology showing perifollicular lymphocytes and eosinophils supports this branch and redirects care away from antibacterial-only management.PubMedPubMedFolliculitis - StatPearls - NCBI Bookshelf

For recurrent or treatment-resistant lesions, reassess morphology and sampling strategy rather than simply broadening antimicrobial exposure. Direct examination of pustule contents is a practical discriminator between Malassezia folliculitis and bacterial folliculitis, while biopsy is appropriate when direct testing is unrevealing or the presentation remains complex.PubMed+1PubMedMalassezia Folliculitis: An Underdiagnosed Mimicker of Acneiform EruptionsPubMedMalassezia Folliculitis: Pathogenesis and Diagnostic Challenges - PMC

Prompt dermatology referral is warranted for suspected folliculitis decalvans, biopsy-confirmation needs, atypical scalp disease, or progressive disease despite phenotype-directed management.ScienceDirect+3ScienceDirectFolliculitis Decalvans - an overview | ScienceDirect TopicsPubMedFolliculitis - StatPearls - NCBI BookshelfPubMedMalassezia Folliculitis: Pathogenesis and Diagnostic Challenges - PMCPubMedSuccessful treatment of refractory folliculitis decalvans with apremilast - PMC