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. It 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 not a sign of serious disease. They are more common with age. They may be treated if you do not like how they look.
Duvic M. Urticaria, drug hypersensitivity rashes, nodules and tumors, and atrophic diseases. In: Goldman L, Schafer AI, eds. Cecil Medicine. 24th ed. Philadelphia, PA: Saunders Elsevier; 2011:chap 448.
Habif TP, ed. Cutaneous manifestations of internal disease. Clinical Dermatology. 5th ed. St. Louis, Mo: Mosby Elsevier; 2009:chap 26.
Neff AG, Carter KD. Benign eyelid lesions. In: Yanoff M, Duker JS, eds. Ophthalmology. 3rd ed. St. Louis, Mo: Mosby Elsevier; 2008:chap 12.9.
David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine. Also reviewed by A.D.A.M. Health Solutions, Ebix, Inc., Editorial Team: David Zieve, MD, MHA, David R. Eltz, and Stephanie Slon.