Conversation so far:
where are hair follicles located in the skin
The hair follicles are located in the dermal layer of the skin.
what do hair follicles do
The hair follicle regulates hair growth via a complex interaction between hormones, neuropeptides and immune cells.
are there any diseases that affect the hair follicles
Well known diseases of the hair follicle include alopecia or hair loss, hirsutism or excess hair growth and lupus erythematosus.

Question: are the follicles everywhere on the body
Self-contained rewrite: are the follicles everywhere on the body