A sebaceous adenoma is a small bump. There is usually only one, and it is usually found on the face, scalp, belly, back, or chest. A sebaceous adenoma may be a sign of more serious internal disease.
If you have several small bumps of the sebaceous glands, this is called sebaceous hyperplasia. Such bumps are usually are harmless and often found on the face. They are more common with age. They may be treated if you do not like how they look.
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David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.