{"id":216,"date":"2025-07-09T06:08:48","date_gmt":"2025-07-09T13:08:48","guid":{"rendered":"https:\/\/scienceblog.com\/sciencechina\/?p=216"},"modified":"2025-07-09T06:08:48","modified_gmt":"2025-07-09T13:08:48","slug":"back-and-chest-acne-needs-different-treatment-than-face","status":"publish","type":"post","link":"https:\/\/scienceblog.com\/sciencechina\/2025\/07\/09\/back-and-chest-acne-needs-different-treatment-than-face\/","title":{"rendered":"Back and Chest Acne Needs Different Treatment Than Face"},"content":{"rendered":"

Nearly half of adults with facial acne also develop breakouts on their chest and back, yet most treatments ignore crucial differences between these body regions. New research reveals that truncal acne\u2014affecting the torso\u2014operates through distinct mechanisms that require tailored therapeutic approaches.<\/p>\n

The comprehensive analysis, published in the Journal of Dermatologic Science and Cosmetic Technology<\/a>, challenges the common practice of applying facial acne treatments to body breakouts. While facial acne research dominates scientific literature, truncal acne affects up to 80% of adolescents and persists into adulthood with more severe scarring potential.<\/p>\n

The Hidden Differences<\/h2>\n

Contrary to expectations, trunk skin produces less sebum than facial skin, yet experiences more severe microbial imbalances. The research team, led by scientists at Shandong Huawutang Biotechnology, found that pH control plays a more critical role in truncal acne than sebum regulation.<\/p>\n

“The high sebum-secreting regions of the face showed higher pH levels (5.4\u20135.6) than those of the torso (5.0\u20135.2),” the study reveals. This pH difference creates an environment where different bacterial communities flourish compared to facial skin.<\/p>\n

The microbial landscape differs dramatically between face and trunk. Truncal samples showed higher colonization by Enterococcaceae bacteria, while facial samples favored Staphylococcaceae and Propionibacteriaceae. Most significantly, Malassezia fungus prevalence was markedly higher in chest and back acne lesions.<\/p>\n

Gender and Friction Factors<\/h2>\n

Men develop truncal acne more frequently than women\u201454% versus 43%\u2014with different distribution patterns. Back acne predominates in males, while chest acne affects more females, likely due to bra friction and heat retention.<\/p>\n

Clothing friction emerged as a key trigger that distinguishes truncal from facial acne. The constant contact with fabric, combined with sweat and heat, creates unique conditions that facial treatments don’t address. Key findings include:<\/strong><\/p>\n