Pimples form when your hair follicles become clogged with excess sebum and dead skin cells, creating an environment where bacteria multiply and trigger inflammation. Understanding why breakouts occur and how to match treatment intensity to acne severity is the key to clear skin. Key Takeaways Acne develops when hormones stimulate excess sebum production, dead skin cells clog pores, and bacteria trigger inflammation Comedonal acne (blackheads, whiteheads) requires different tr