What causes pimples under the chin?

Chin chin pimples can be caused by acne, folliculitis, etc.
1. The most common cause of chin acne is acne, which is characterized by pimples, papules and pustules due to changes in androgen levels and sebum secretion, leading to increased sebaceous gland secretion, and the mixing of sebum and epidermal tissues that clogs up the hair follicles, resulting in acne flare-ups, usually characterized by pimples, papules and pustules.
Acne is usually associated with puberty and will subside on its own as the teenager matures, while a small percentage of people will continue to experience flare-ups until after the age of 35.
2. It may also be caused by bacteria and fungi invading the hair follicles. Sweating, scratching, and poor hygiene habits are common triggering factors, and it mainly manifests itself as pimples or pustules centered on hair follicles.
It is recommended to keep the face clean, avoid irritating the skin, go to the dermatology department of the hospital if necessary, and follow the doctor’s instructions to standardize the treatment.