Hard lumps left behind by folliculitis are considered to be scarring, which can be treated by topical medication or injections to eliminate them. However, due to the individual physique and different conditions, there is no fast elimination. 1. Topical medication: under the guidance of a doctor, you can choose to use topical mucopolysaccharides polysulfate cream or cumeneoside cream ointment and other drugs to help soften and eliminate the hard lumps left behind by folliculitis. 2. Injections: For the hard lumps left behind by folliculitis, you can also choose local injections of Trenbolone acetate injection, or compound betamethasone injection and other glucocorticosteroid drugs, which can play a better anti-fibroplastic and anti-inflammatory effect, thus promoting the elimination of the hard lumps left behind by folliculitis. When you need to use drugs for treatment, you should be under the guidance of a professional doctor and combine with your personal situation to make a choice, to avoid blind use of drugs, resulting in local skin atrophy and other adverse reactions.