Detailed answer

Using dirty makeup brushes on the jawline can contribute to the formation of whiteheads. Dirty brushes can accumulate bacteria, oils, and dirt, which can clog pores and lead to whiteheads. It is important to regularly clean and sanitize makeup brushes to prevent bacterial buildup and potential skin issues. Additionally, practicing good skincare habits such as cleansing the face properly and using non-comedogenic products can help minimize the occurrence of whiteheads.