Breast cysts are common, harmless, and often feel like round, movable lumps in your breast. To diagnose a breast cyst, get a mammogram or ultrasound to check if the mass is fluid-filled. Most breast ...

Lumps can develop in breast tissue in people of all sexes and genders. If you notice a lump, whether you suspect it might be a cyst, a tumor, or something else, it is important to consult a doctor.