A hard lump on the eyebrow bone can be considered as folliculitis, epidermal cysts, skin tumors and so on. 1. Folliculitis: if the hard bumps on the eyebrow bone are red papules centered on hair follicles, accompanied by itching and pain, it is considered folliculitis; this symptom is mostly caused by bacteria and other pathogens (Staphylococcus aureus is the main one) infecting the hair follicles and triggering the inflammation. 2. Epidermal cysts: patients may also consider epidermal cysts; this disease is mostly manifested as isolated intradermal or subcutaneous nodules, a few millimeters to several centimeters in size, tense and elevated, medium hardness; this disease is mostly caused by embryonic ectasia, or due to skin injuries (traumatic injury, surgical operations, etc.) cause epidermal cells implanted in the subcutaneous, which is caused by the dermal epidermal cell hyperplasia, keratinocyte aggregation of the limitation. 3. Skin tumor: the hard lumps on the brow bone of patients may also be the nodules of skin tumors (such as cutaneous T-cell lymphoma, etc.); the patients need to carry out pathological section examination in time. It is recommended that patients go to regular hospitals, under the guidance of professional doctors to conduct relevant examinations, to clarify the cause of the disease as early as possible, and to carry out targeted treatment.