The hard nodules left after self-healing folliculitis usually fade over 3-6 months with aggressive treatment, and may persist for a long time if left untreated. The hard nodules left after self-healing folliculitis are mostly due to localized fibrous tissue hyperplasia or scarring and may persist for a long time if left untreated. Fractional laser, laser grinding, radiofrequency, and local intradermal glucocorticoid injection are clinically available for treatment. The hard nodules will gradually disappear in about 3-6 months after the above treatments. In addition, physical therapy such as ultraviolet radiation or ultrashort wave therapy can also be used. If the nodules are large and hard, surgical excision is also an option. If the hard nodules appear after the folliculitis heals itself, it is important to keep the local skin clean, often wash it with warm water, and you can cut the hair short and treat it with topical antibiotics and scar prevention ointment under the guidance of a doctor.