👉 Appear pimples, also known as acne, are small, often red or inflamed bumps on the skin caused by a combination of factors including excess oil production, clogged pores, and bacterial infection. When pores become blocked by dead skin cells, dirt, and oil, bacteria can multiply, leading to inflammation and the formation of pimples. Hormonal changes, stress, genetics, and certain medications can also contribute to their development. These pimples can vary in size and shape, from small whiteheads to larger blackheads or pustules, and may leave behind scars if not treated properly.