Sebaceous cysts are mostly found on the face, neck, or torso. They grow slowly and are not life threatening, but they may become uncomfortable if they go unchecked.
Doctors usually diagnose a cyst with only a physical examination and medical history. In some cases, a cyst will be examined more thoroughly for signs of cancer.
Causes of a Sebaceous Cyst
Sebaceous cysts form out of your sebaceous gland—which produces the oil called sebum that coats your hair and skin. Cysts can develop if the gland or its duct, the passage where oil is able to leave, become damaged or blocked. This usually occurs due to a trauma to the area.
Symptoms of Sebaceous Cyst
Sebaceous cysts are generally found on skin that is easily seen—such as the face, neck, or torso. This can make the affected person uncomfortable since the cysts might be considered unattractive.
This type of cyst is typically filled with white flakes of keratin, which is also a key element making up your skin and nails. Most cysts are soft to the touch.