Folliculitis is a very common skin condition that most people have experienced. It is primarily caused by the infection of the hair follicles and the surrounding areas by bacteria, predominantly Staphylococcus aureus and Streptococcus. The scalp, due to its developed sebaceous glands and abundant hair, secretes a lot of oil and is particularly prone to bacterial growth, making it a common site for folliculitis. It is crucial to treat folliculitis with timely anti-infection measures.