A ganglion cyst is a noncancerous lump filled with a jelly-like fluid. Most are harmless but can be uncomfortable, particularly on the foot. They often disappear on their own, but pain relief, a ...
Medically reviewed by Susan Bard, MD Boils are painful, pus-filled, and are caused by infections like Staphylococcus aureus.Cysts are painless, non-infectious growths filled with keratin or other ...