How come i have big lumps in both breasts?

See a physician: This is not an appropriate forum for providing you with a satisfactory answer, . You really need a full history and examination as well as diagnostic imaging to review all the possibilities (benign and malignant) and you should see a physician for this. Please schedule soon.

Need 2 C Ur Doctor: Most women's breasts are "lumpy-bumpy", especially after pregnancies +/- breastfeeding. This is because most of the breast consists of fat; the islands of milk-producing tissue tend to consolidate and change in response to hormonal changes. This should be no cause for concern and this should improve after menopause. However, don't become complacent-any new lump warrants evaluation.