June 2022 in “Indian Dermatology Online Journal” A man with total hair loss developed blackhead-like spots on his scalp, possibly because no hair was present to help drain oils.
103 citations
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September 2004 in “Clinics in dermatology” Blocked hair follicles cause acne, and studying tiny early acne spots helps understand its severity.
13 citations
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January 2018 in “Skin Appendage Disorders” Dermoscopy improves diagnosis and treatment planning for trichostasis spinulosa.
June 2022 in “Journal of Education, Health and Sport” The paper reviews acne treatments for women with PCOS but doesn't give specific advice.
47 citations
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January 2015 in “Dermatology” The best way to treat acne is to prevent healthy skin glands from turning into acne lesions by controlling the triggers early on.