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Glossary Bacterial Alopecia

hair loss caused by bacterial scalp infections

Bacterial Alopecia refers to hair loss caused by bacterial infections of the scalp. These infections can damage hair follicles, leading to inflammation and subsequent hair shedding. Common bacteria involved include Staphylococcus aureus, which can cause folliculitis, an infection of the hair follicles. Treatment typically involves antibiotics to eliminate the bacterial infection and measures to promote scalp health.

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Research

5 / 1000+ results

research Immunization and Bacterial Pathogens in the Oropharynx as Risk Factors for Alopecia Areata

3 citations , January 2010 in “Actas Dermo-Sifiliográficas”

This study found that a history of immunization and throat carriage of bacterial pathogens, including Streptococcus pyogenes, were associated with increased risk of developing alopecia areata.

Scalp Bacterial Microbiota Dysbiosis in Androgenetic Alopecia: Community Structure, Functional Profiles, and Associations with Lifestyle Factors

research Scalp Bacterial Microbiota Dysbiosis in Androgenetic Alopecia: Community Structure, Functional Profiles, and Associations with Lifestyle Factors

June 2026 in “medRxiv”

This study found that patients with androgenetic alopecia showed distinct scalp bacterial imbalances compared to healthy individuals, which were associated with unhealthy lifestyles. These microbial changes might contribute to follicular inflammation, potentially accelerating hair loss in these patients.

CD27 and IL-35 as Diagnostic Biomarkers in Alopecia Areata: First Evidence of Association with Pathogenic Scalp Bacterial Infections

research CD27 and IL-35 as diagnostic biomarkers in alopecia areata: First evidence of association with pathogenic scalp bacterial infections

December 2025 in “Babcock University Medical Journal”

This study found that in patients with Alopecia Areata, CD27 and IL-35 levels were significantly higher in those with bacterial infections, suggesting they may be useful as immunological biomarkers.

research Scalp bacterial shift in Alopecia areata

48 citations , April 2019 in “PloS one”

This study observed a microbial shift on the scalp of Alopecia areata patients, characterized by an increase in Propionibacterium acnes and a decrease in Staphylococcus epidermidis, compared to healthy controls.

research Scalp Bacterial Profile and Antibiotics Susceptibility Pattern in Patients With Primary Cicatricial Alopecia

January 2025 in “Annals of Dermatology”

This study reports that patients with primary cicatricial alopecia have distinct bacterial colonization and higher antibiotic resistance compared to those with non-inflammatory scalp conditions, indicating the importance of bacterial culture and susceptibility testing for targeted therapies.

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Community Join

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community Androgenetic alopecia is a skin disease: DHT-mediated skin disorders

63 upvotes 2 years ago

Dihydrotestosterone (DHT) impacts various skin conditions, including Androgenetic alopecia and seborrheic dermatitis, by causing overactivity in sebaceous glands. Topical medications Tacrolimus and Clobetasol can reduce these inflammatory conditions, and treatments like RU58841, Minoxidil, and Finasteride may also be beneficial.

community Bruteforcing alopecia or the new advent of science progress

22 upvotes 1 year ago

Combining therapies like scyllo-inositol, alpha-ketoglutarate, and autophagy-inducing supplements may enhance hair growth and prevent hair loss. Reporting individual results can accelerate progress in hair loss treatments.

community L. reuteri (probiotic for Androgenic Alopecia)

in Finasteride/Dutasteride 34 upvotes 5 months ago

L. reuteri, a probiotic, is being explored for its potential benefits in treating androgenic alopecia, possibly enhancing finasteride's effects and reducing inflammation. The user combines this with finasteride, oral minoxidil, and other supplements, noting some improvement in hair loss.

community DHT Harms Scalp Microbiome: DHT Itch is REAL

413 upvotes 1 year ago

Increased Malassezia and Cutibacterium in the scalp microbiome are linked to higher sebum production and inflammation in androgenetic alopecia (AGA). Treatments include ciclopirox shampoo, benzoyl peroxide shampoo, clobetasol propionate, calcipotriol, minoxidil, finasteride, and dutasteride.

community Why Fin/Dut is always recommended. The top 10 reasons for hairloss in men.

2 upvotes 1 year ago

Hair loss in men is primarily caused by androgenetic alopecia, with treatments like finasteride and dutasteride often recommended. Other causes include stress, nutritional deficiencies, medications, and scalp infections.

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Learn

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learn Overview

learn Rapamycin

mTOR regulator and immunosuppressant used more recently for anti-aging and hair regrowth

learn Azelaic Acid

acid used for antimicrobial, anti-inflammatory and anti-androgenic properties

learn Neem Oil

natural substance from Neem tree with medicinal and pesticidal properties

learn Thymosin Beta 4

learn Baicapil

Struggling with patchy hair loss like alopecia areata? Baicapil might help by reducing inflammation and reactivating growth. There is no published trial of Baicapil in alopecia areata. The anti-inflammatory and hair-density claims come from the ingredient's manufacturer and from laboratory work on its plant extracts, in people with androgenetic-type hair loss rather than autoimmune patchy hair loss.

learn Salicylic acid

What makes alopecia areata different from other types of hair loss, and can topical Salicylic acid treatments help regrow the affected areas? Alopecia areata is an autoimmune condition, and salicylic acid does not promote hair regrowth.

learn PP405

Got small bald patches they say are from stress? PP405 sprays could help bring them back to life. PP405 is an experimental topical gel from Pelage Pharmaceuticals that inhibits the mitochondrial pyruvate carrier; its registered Phase 2 trial (NCT06393452) tested it once daily in 78 adults with pattern hair loss, for safety and tolerability. It is not approved, not for sale, and has not been studied in alopecia areata or stress-related shedding.

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