Underarm blackhead follicle blockage is generally referred to as folliculitis, which is a purulent inflammation limited to the mouth of the hair follicle. It can be treated by general treatment, topical medication, oral medication and other methods. 1. General treatment: daily diet should pay attention to light, avoid spicy food stimulation, pay attention to skin hygiene, prevent trauma and enhance immunity. 2. Topical medication: 20% ichthyol ointment, 3% iodine tincture can be used externally for those who are not suppurating in the early stage, and antibiotics such as mupirocin ointment and fusidic acid ointment can also be used externally. 3. Oral medication: If the skin lesions are heavily infected, oral cephalosporin antibiotics such as cefprozil can be taken if necessary. Folliculitis patients should go to the hospital in a timely manner, the medication please follow the doctor’s instructions, do not take medication without authorization.