Medically reviewed by Susan Bard, MD Boils are painful, pus-filled, and are caused by infections like Staphylococcus ...

Ovarian cysts are usually not painful and will go away on their own. However, if a cyst is growing or you have multiple cysts you may have symptoms and need surgery. A ruptured cyst can cause severe ...

People with hidradenitis suppurativa (HS) sometimes receive misdiagnosis for other conditions, including folliculitis and acne. A dermatologist can make an accurate diagnosis. Hidradenitis suppurativa ...

Tarlov cysts are a condition where you develop cysts on the nerves of your spine. These pockets of fluid aren't life-threatening, but they can lead to symptoms like pain or muscle weakness. The cysts ...