A sebaceous cyst is a closed sac under the skin filled with a cheese-like or oily material.

 

Causes:

 - Sebaceous cysts most often arise from swollen hair follicles. Skin trauma can also cause a cyst to form. A sac of cells is created into which a protein called keratin is secreted.

 

Symptoms:

- The main symptom is usually a small, non-painful lump beneath the skin. The lump is usually found on the face, neck and trunk. It usually grows slowly and is not painful.

When the lump becomes infected you may experience pain, redness and swelling of the area.

 

Treatment:

Sebaceous cysts are not dangerous and can usually be ignored. Warm compressions may help the cyst to drain quicker.

If the cyst becomes swollen, tender, or large, your doctor may drain it or perform surgery to remove it.

Cysts may return, even after they are surgically removed.