Breast Cyst: When to Be Seen
A breast cyst is a fluid-filled sac within the breast. Cysts are very common, especially in women in their 40s and 50s, and are almost always benign. They can feel smooth and moveable, and may be tender. Any new lump should still be assessed to confirm it is a simple cyst.
What is a breast cyst?
A breast cyst is a small sac of fluid that forms within the breast tissue. Cysts can be tiny or large enough to feel as a lump. They are part of normal breast changes and are most common in the years approaching the menopause.
How a cyst is diagnosed
Ultrasound reliably shows whether a lump is a simple cyst. If it is, no further action is usually needed. A large or uncomfortable cyst can be drained with a fine needle during the same visit. Complex cysts may be sampled to be certain. Book via the one-stop clinic.
When to seek medical advice
See a doctor promptly — or call 999 if you feel acutely unwell — if you notice any of the following:
- A lump that feels hard, fixed or irregular
- A cyst that keeps refilling in the same place
- Blood-stained fluid if drained
- Skin dimpling or nipple change
- A rapidly enlarging lump
Most breast changes are not cancer. But any new or persistent change should be assessed. Our one-stop breast clinic offers same-day specialist assessment.
Frequently asked questions
Are breast cysts dangerous?
Simple breast cysts are benign and do not raise breast cancer risk. They are very common, particularly in the years before the menopause. Complex cysts are sometimes assessed further to be sure.
Do breast cysts need to be drained?
Not usually. A simple cyst only needs draining (aspiration) if it is large, painful or causing concern. Many resolve on their own.
Can cysts come back?
Yes. Cysts can recur or appear in new areas, especially around the menopause. Recurrent cysts in the same spot are sometimes reviewed with imaging.
Related information
Sources
Worried about a breast symptom?
Book a same-day one-stop appointment with Mr Debashis Ghosh, or call our team in confidence.