Compound ketoconazole hair lotion can treat folliculitis caused by fungal infections, commonly known as Malassezia folliculitis. Folliculitis is a purulent infection that occurs in the hair follicles and is divided into infectious and non-infectious. The pathogens of infectious folliculitis are mainly fungi, viruses and bacteria. It occurs in areas with hair and vulnerable to friction, such as the head and face, neck, buttocks, vulva and so on. As cotrimoxazole hair lotion is suitable for the treatment and prevention of a variety of fungal infections, and thus can treat fungal infections folliculitis, but also scalp furuncle, seborrheic dermatitis and lichen planus, but for the treatment of folliculitis caused by other than fungal infections, usually not too effective. When using compound ketoconazole to treat folliculitis caused by fungal infection, patients need to pay attention to avoid contact with eyes and other mucous membranes when using the drug. If there is burning sensation, redness and swelling in the area where the drug is used, the drug should be discontinued and the local drug should be washed away, and serious cases should seek medical attention promptly. It is prohibited for those who are allergic to this product, for patients with viral infections such as herpes, chicken pox, and for pediatric patients, pregnant and lactating women. The treatment of folliculitis varies with different etiologies. Patients with bacterial folliculitis can apply topical mupirocin ointment, fusidic acid cream, compound polymyxin B ointment, clindamycin phosphate gel, etc. Local irradiation with ultraviolet light or ultrashort wave is also available. For deep folliculitis with obvious inflammatory infiltration and deeper invasion, oral antibiotics or antifungal drugs may be administered as appropriate. Also pay attention to local cleanliness and hygiene, remove all possible triggers and aggravating factors, such as scratching, rubbing, squeezing, or eating spicy and irritating foods.