Acne hard lumps may be caused by acne, folliculitis and other diseases, which can be eliminated by general treatment and medication. 1. Acne: If acne is the cause of acne hard lumps, patients should pay attention to local hygiene and should use mild skin cleansers. Topical retinoids such as retinoic acid cream and tazarotene gel can be used as prescribed by the doctor, which can regulate cell differentiation. Patients with moderate to severe acne can be treated with oral antibiotics, such as doxycycline and minocycline. 2. Folliculitis: Acne hard lumps may be caused by folliculitis, patients should avoid squeezing and kneading the affected area. If it is caused by bacterial infection, you can follow the doctor’s instructions for topical erythromycin, clindamycin and other antibiotics, if it is caused by fungal infection, you can follow the doctor’s instructions for topical antifungal drugs, such as miconazole, naftifine and so on. For patients with acne hard lumps, it is recommended to go to a regular hospital for examination, to clarify the cause of the disease, and cooperate with the doctor to standardize the treatment.