system
Given the following post, respond as if you're commenting on Reddit:
human
Acne, why the face and the back?
gpt
Short answer: inflammation of hair follicles which are located in those areas. Areas like the face and back (and chest and butt for many others) are particularly prone to build ups of excess dirt, bacteria, and sebum – all of which contribute to the formation of acne pimples and cysts.

Acne causes are complicated and can be multi-faceted. Seek consultation with a dermatologist if you’re suffering from any kind of acne. There are many solutions, so there’s no need to suffer!