Sebaceous cyst

Sebaceous cysts come from your sebaceous glands. Cysts can develop if the gland or its duct (the passage through which the sebum leaves for the skin) gets damaged or blocked. This usually happens as a result of some sort of trauma in the area such as a scratch, a surgical wound, or a skin condition like acne. The cysts can also form because of a misshapen or deformed duct, or genetic conditions such as basal cell nevus syndrome.