system
Given the following post, respond as if you're commenting on Reddit:
human
eli5 why do hands never get acne or pimples from touching dirty things

i was wondering about this hecause whenever i use a towel to wipe my face i get a few pimples but my hands touch way dirtier stuff everday consistently but they never get acne or pimples. Why is this?
gpt
Acne is a disorder of hair follicles and sebum glands. The palms of your hands have neither of those things. 

Acne is most commonly found on the face because that's where the majority of the body's sebum glands are, though it's also possible to have on the chest, shoulders, or back.