Acne occurs when hair follicles become clogged with dead skin cells and sebum, often allowing bacteria to proliferate and cause inflammation. Breakouts can appear as blackheads, whiteheads, pimples, or deeper cystic lesions, and are most common on the face and neck but can develop on the chest, back, and shoulders. While factors like hormones, genetics, diet, and stress can all play a role, acne is not simply a matter of poor hygiene. For many people, consistent at-home skincare helps manage mild breakouts, but persistent or severe acne may benefit from professional evaluation to determine the best approach and prevent long-term scarring.