Sebaceous hyperplasia causes small bumps to appear on the skin when sebaceous glands become enlarged. Sebaceous glands secrete an oily substance called sebum. Too much sebum can contribute to several problems, including acne, oily skin, or an oily scalp.
This has been termed variously in the literature as facial hemihypertrophy, hemimacrosomia, partial/unilateral gigantism, congenital hemifacial hyperplasia.
Hemifacial hyperplasia is a rare developmental anomaly characterized by marked unilateral facial tissues. It involves orofacial soft tissues, bones of the face .
Sebaceous hyperplasia occurs when the sebaceous glands become enlarged with This creates shiny bumps on the skin, especially the face.