👉 Appeared pimples, also known as whiteheads or closed comedones, are small, often round bumps that form on the skin's surface due to clogged pores. They occur when hair follicles become blocked by a mix of sebum (oil), dead skin cells, and bacteria. When the pore becomes blocked from the inside out, it can trap these substances, leading to inflammation and the formation of a small, closed plug. This plug remains beneath the skin's surface until it ruptures, causing the pimple to become visible and often inflamed.