Question: what is the difference between a cyst and a lump in your breast?
Answer: A cyst in the breast may feel like a lump, but upon examination the lump is a small, generally harmless sac filled with fluid rather than a cancerous or benign lump of cells. You may have one cyst or many cysts that appear together. Cysts are more common in premenopausal women and can cause localized pain.