Noun
bacne (uncountable)
(informal) Acne on the back.
(Can we date this quote by Acne website and provide title, author’s full name, and other details?) Bacne seems to be suffered more by men than by women, though women do have outbreaks of acne on their backs as well. - Acne Resource Center
The bacne regimen is identical to the regular regimen with the addition of an 8-10% glycolic acid (alpha hydroxy) lotion. - Acne.org
I am a 25 year old female that has bacne. Source: Internet
Kendall Jenner's skin doctor explains why we get bacne Stop doing this, now. Source: Internet