Pimples are small, raised bumps on the skin that occur when hair follicles become clogged with oil, dead skin cells, and bacteria. They are most commonly associated with acne, a skin condition that affects many teenagers and young adults, but can occur at any age. Pimples can appear on the face, back, shoulders, and chest. The main types of pimples include whiteheads, blackheads, and papules. While they are not usually serious, they can cause discomfort and may lead to scarring if not treated properly. Maintaining good skin hygiene and using appropriate skincare products can help prevent and manage pimples.