Sebaceous Cyst occurs in the sebaceous gland that produces oil called sebum which is responsible for coating the hair and skin. At times, the sebaceous gland is blocked due to which sebum does not get a passage to release the oil. As a result, a cyst starts to grow under that area.
In most of the cases, no specific cause is found. A scratch, a surgical wound or any skin condition can be one of the reasons for blocking the sebum to be released, causing Sebaceous Cyst. The cyst does not start to grow immediately; in fact, it might take months to grow to a size that the patient can feel it. Apart from the above-mentioned causes, there are a few other factors as well that can lead to Sebaceous Cyst.