A hard bump on the forehead may be caused by sebaceous cysts, lipomas, frontal sinusitis and other diseases.
1. Sebaceous cysts: due to the blockage of the sebaceous glands of the hair follicles, sebum accumulates to form cysts, which is a benign skin lesion that can occur in the facial area as one or more rounded swellings, with a medium hardness and elasticity, and the patient will have the symptom of hard bumps on the brain.
2. Lipoma: a subcutaneous swelling formed by the accumulation of mature fat cells in the brain, which can be manifested as a hard bump on the brain.
3. Frontal sinusitis: often secondary to rhinitis, is an inflammatory disease, with nasal congestion, runny nose, headache as a common symptom, there are frontal swelling symptoms, which is manifested in the brain door long hard bumps.
There are many reasons for long hard bumps on the brain, and it is recommended that patients go to the hospital in time to clarify the cause of the disease.