Hair loss for about half a year can lead to the death of hair follicles. The death of hair follicles is usually caused by folliculitis, which is due to damage or blockage of the follicles, leading to redness, itching, and pain in the center of the follicle, appearance of papules and pustules, and in severe cases, ruptured pustules that crust over and form permanent skin damage, such as scars and hair loss. Therefore, it is crucial to seek medical attention promptly upon signs of folliculitis. Diagnosis can be confirmed through physical skin examinations, laboratory tests, and pus examination. Timely treatment usually involves the application of topical antibiotics like Mupirocin ointment, topical corticosteroids such as Budesonide ointment, and for patients with poor response to topical medication, ultraviolet light treatment of the infected area may be chosen. (Medication should be used under the guidance of a doctor.)