A dermoid cyst is a fluid-filled sac near the surface of the skin that may have also hair, skin, or other tissues inside. These cysts form during a baby’s development before birth and usually need ...

Q: My son, 17, developed a pilonidal cyst in June and also had a bad infection from it. The surgeon refused to operate while he was infected. The cyst was just gross - so much blood and other yuck.

Cysts, abscesses and lipomas all have one common feature: they cause a lump or bump on the skin. All three are very common and I literally remove a hundred or more lipomas and sebaceous cysts a year.

OUR resident specialist and NHS GP, Dr Zoe Williams, shares her expert advice. Today, Dr Zoe helps a reader who has a small lump on their back. You'll now receive top stories, breaking news, and more, ...

Medically reviewed by Susan Bard, MD Key Takeaways A pilonidal cyst is a painful lump located at the base of the spine at the top of the buttocks.Symptoms can include a painful lump, discharge, and ...