A hard lump in the middle of the eyebrow may be caused by folliculitis, infectious molluscum contagiosum, sebaceous cysts, etc., and can be removed by topical medication, physiotherapy and surgery as prescribed by the doctor. 1. folliculitis: a hard lump in the middle of the eyebrow, may be a bacterial infection caused by folliculitis, the patient can follow the doctor’s instructions to apply erythromycin ointment, mupirocin ointment and other drugs. 2. Molluscum contagiosum: a hard lump in the middle of the eyebrow may be caused by molluscum contagiosum, usually manifested as a waxy glossy pimple or nodule, which can be squeezed out of the cheese-like mollusc body. It can be treated by wart clamping or laser. 3. Sebaceous cysts: a hard lump in the middle of the eyebrow may be a sebaceous cyst. If the sebaceous ducts are blocked, the secretions will accumulate and form a cyst. The patient can elective surgery to remove. Patients with symptoms of a hard lump in the middle of the eyebrow, should go to the hospital in time, under the guidance of the doctor for treatment, to avoid blind use of drugs to cause adverse consequences.