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 ...

According to the American Society of Colon and Rectal Surgeons, Pilonidal disease is a chronic skin infection that affects about 70,000 people in the United States annually. While the cause is not ...