Pimples are also known as acne and folliculitis is not a pimple.
Folliculitis is an infectious inflammatory reaction to a hair follicle. Since hair, body hair, etc. grows out of the mouth of the follicle, folliculitis can occur in any area of the body where hair exists. Folliculitis occurs on the scalp, face, buttocks and thighs. Clinical symptoms include red papules centered on hair follicles, which may be accompanied by itching and pain.
On the other hand, acne is a chronic inflammatory disease that occurs in the sebaceous glands of hair follicles, and is most common in areas with dense sebaceous glands, such as the cheeks, forehead, jaw, and back, etc. The main causes of acne are excessive sebum secretion, abnormal keratinization of the cells around the hair follicles, and overproliferation of the Propionibacterium acnes bacterium, etc. The typical symptoms of acne include pimples and skin tags. Typical symptoms of acne include pimples, papules, and pustules, which may also be accompanied by seborrhea.
Both acne and folliculitis should be treated aggressively once diagnosed.