Folliculitis occurs in areas where the sebaceous glands are active, including the head and face, neck, chest and back, buttocks, and vulva. Folliculitis can occur in areas of the body where there is hair growth, i.e., where hair follicles are present. Sebaceous glands are found in all parts of the body except the palmoplantar and flexor-plantar areas, and the density of distribution varies from one part of the body to another, with the head, face, and upper back of the chest being the most distributed, hence the name sebaceous areas. Most of the sebaceous glands open to the hair follicles, and when sebum secretion is high, dirt such as dust is easily attached, resulting in blocked pores and infection, so folliculitis usually occurs in these areas. Folliculitis is mainly manifested by the formation of red and swollen rashes and pustules around the hair follicles, which may break and crust and may be accompanied by itching or pain. If folliculitis occurs, do not squeeze or pick the pustules, they will heal themselves within 2 weeks if symptoms are mild. Damage to the hair follicle increases the likelihood of infection, the most common cause is skin trauma, shaving and hair plucking in daily life may damage the hair follicle. Frequent use of cosmetics can also easily cause hair follicle blockage, so it is important to remove makeup reasonably and try not to leave residual cosmetics to ensure facial cleanliness.