These cysts may be found on the trunk, face, neck and most commonly the scalp. Generally, they are benign painless lumps under the skin, but have the potential to become painful and/or infected. This is best avoided by removal under local anesthesia.
What is a sebaceous cyst?
A cyst usually is a slow-growing lump that can move easily under the skin. These cysts are closed sacs that can be found under the skin of the entire body (except the palms of the hands and soles of the feet).
What causes sebaceous cysts?
Sebaceous cysts may be caused by blocked glands or swollen hair follicles in the skin. Trauma to skin has been reported, as well. Cysts sometimes are inherited.
What are the symptoms of sebaceous cysts?
The main symptom of a sebaceous cyst is that it is a lump under the skin. The lump is usually not painful. In some cases, however, cysts can get inflamed and become tender to the touch. The skin on the area of the cyst may be red and warm. Drainage from the cyst will appear grayish-white and cheese-like, and will have a foul smell.
