Acne is a common skin problem that occurs when pores get clogged with oil, bacteria, or dead skin cells, leading to pimples, blackheads, and whiteheads. It usually appears on the face, chest, shoulders, and back. Hormonal changes, stress, oily products, poor diet, and genetics are the main causes of acne. Common types include cystic, hormonal, and nodular acne, which can lead to scars if untreated. Regular cleansing, using non-comedogenic products, and avoiding picking or squeezing pimples help control acne. For stubborn acne, dermatologists recommend medical treatments like retinoids, antibiotics, or laser therapy to reduce breakouts and prevent future scars.