What can happen to a sebaceous cyst if it is ignored?

If left untreated, a sebaceous cyst may cause various complications:

1. Enlargement and Discomfort: Over time, a sebaceous cyst may continue to grow larger and cause discomfort, especially if it is located in an area that experiences friction, such as the scalp, face, or back.

2. Rupture and Infection: In some cases, a sebaceous cyst may rupture due to trauma or inflammation, leading to the release of its contents into the surrounding skin. This can lead to a secondary infection, causing redness, swelling, pain, and the formation of pus.

3. Scarring: Rupture or surgical removal of a sebaceous cyst can leave behind a scar, the appearance of which may vary depending on the size and location of the cyst.

4. Rare Complications: In rare cases, a sebaceous cyst may undergo malignant transformation, becoming a cancerous growth known as a sebaceous gland carcinoma. However, this complication is very uncommon.

It is important to seek medical attention if a sebaceous cyst becomes painful, infected, or significantly larger to minimize potential complications and obtain proper treatment.