Acne can be caused by various factors, including hormonal changes, bacteria, inflammation, excess oil production, and clogged pores. Hormonal acne is often characterized by breakouts around the chin and jawline, typically occurring around the time of menstrual cycles in females or during times of hormonal fluctuations. Bacterial acne, on the other hand, is caused by a particular type of bacteria called Propionibacterium acnes that thrives in clogged pores and causes inflammation and infection, leading to acne breakouts. To determine whether your acne is hormonal or bacterial, it is best to consult with a dermatologist who can assess your skin and provide a proper diagnosis and treatment plan.