A breast lump is a swelling, protuberance, or lump in the breast.
Normal breast tissue is present in both males and females of all ages. This tissue responds to hormonal changes and, therefore, certain lumps can come and go.
Breast lumps may appear at all ages:
- Infants may have breast lumps related to estrogen from the mother. The lump generally goes away on its own as the estrogen clears from the baby's body. It...