Acne can be caused by various factors, including hormones, bacteria, genetics, diet, and skincare products. Hormonal acne typically appears around the chin and jawline, often flaring up before or during menstruation. Bacterial acne, on the other hand, is usually characterized by inflamed, red pimples with whiteheads or blackheads. It’s best to consult with a dermatologist for a proper diagnosis and treatment plan tailored to your specific acne type.